Medical-attention injuries in community australian football: A review of 30 years of surveillance data from treatment sources
- Ekegren, Christina, Gabbe, Belinda, Finch, Caroline
- Authors: Ekegren, Christina , Gabbe, Belinda , Finch, Caroline
- Date: 2015
- Type: Text , Journal article
- Relation: Clinical Journal of Sport Medicine Vol. 25, no. 2 (2015), p. 162-172
- Relation: http://purl.org/au-research/grants/nhmrc/565900
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- Description: Objective: In recent reports, Australian football has outranked other team sports in the frequency of hospitalizations and emergency department (ED) presentations. Understanding the profile of these and other "medical-attention" injuries is vital for developing preventive strategies that can reduce health costs. The objective of this review was to describe the frequency and profile of Australian football injuries presenting for medical attention. Data Sources: A systematic search was carried out to identify peer-reviewed articles and reports presenting original data about Australian football injuries from treatment sources (hospitals, EDs, and health-care clinics). Data extracted included injury frequency and rate, body region, and nature and mechanism of injury. Main Results: Following literature search and review, 12 publications were included. In most studies, Australian football contributed the greatest number of injuries out of any sport or recreation activity. Hospitals and EDs reported a higher proportion of upper limb than lower limb injuries, whereas the opposite was true for sports medicine clinics. In hospitals, fractures and dislocations were most prevalent out of all injuries. In EDs and clinics, sprains/strains were most common in adults and superficial injuries were predominant in children. Most injuries resulted from contact with other players or falling. Conclusions: The upper limb was the most commonly injured body region for Australian football presentations to hospitals and EDs. Strategies to prevent upper limb injuries could reduce associated public health costs. However, to understand the full extent of the injury problem in football, treatment source surveillance systems should be supplemented with other datasets, including community club-based collections. © 2014 Wolters Kluwer Health, Inc. All rights reserved.
- Authors: Ekegren, Christina , Gabbe, Belinda , Finch, Caroline
- Date: 2015
- Type: Text , Journal article
- Relation: Clinical Journal of Sport Medicine Vol. 25, no. 2 (2015), p. 162-172
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: Objective: In recent reports, Australian football has outranked other team sports in the frequency of hospitalizations and emergency department (ED) presentations. Understanding the profile of these and other "medical-attention" injuries is vital for developing preventive strategies that can reduce health costs. The objective of this review was to describe the frequency and profile of Australian football injuries presenting for medical attention. Data Sources: A systematic search was carried out to identify peer-reviewed articles and reports presenting original data about Australian football injuries from treatment sources (hospitals, EDs, and health-care clinics). Data extracted included injury frequency and rate, body region, and nature and mechanism of injury. Main Results: Following literature search and review, 12 publications were included. In most studies, Australian football contributed the greatest number of injuries out of any sport or recreation activity. Hospitals and EDs reported a higher proportion of upper limb than lower limb injuries, whereas the opposite was true for sports medicine clinics. In hospitals, fractures and dislocations were most prevalent out of all injuries. In EDs and clinics, sprains/strains were most common in adults and superficial injuries were predominant in children. Most injuries resulted from contact with other players or falling. Conclusions: The upper limb was the most commonly injured body region for Australian football presentations to hospitals and EDs. Strategies to prevent upper limb injuries could reduce associated public health costs. However, to understand the full extent of the injury problem in football, treatment source surveillance systems should be supplemented with other datasets, including community club-based collections. © 2014 Wolters Kluwer Health, Inc. All rights reserved.
Nonautomated Pre-Performance Routine in Tennis : An Intervention Study
- Lautenbach, Franziska, Laborde, Sylvain, Mesagno, Christopher, Lobinger, Babett, Achtzehn, Silvia, Arimond, Fabian
- Authors: Lautenbach, Franziska , Laborde, Sylvain , Mesagno, Christopher , Lobinger, Babett , Achtzehn, Silvia , Arimond, Fabian
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Applied Sport Psychology Vol. 27, no. 2 (2015), p. 123-131
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- Description: The effect of a nonautomated pre-performance routine (PPR) on performance in a high-pressure situation was investigated. Twenty-nine tennis players served in a low- and high-pressure condition in a pre- and posttest design. The intervention group learned a nonautomated PPR for 4 weeks. Increases in subjective but not objective (i.e., cortisol) levels of stress were detected in the high-pressure conditions. The intervention group showed a significant decrease in performance in the high-pressure condition in the pretest (p =.005) but not posttest (p =.161). Using a nonautomated PPR may benefit athletes who experience a drop in performance in high-pressure situations. Copyright © Association for Applied Sport Psychology.
- Authors: Lautenbach, Franziska , Laborde, Sylvain , Mesagno, Christopher , Lobinger, Babett , Achtzehn, Silvia , Arimond, Fabian
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Applied Sport Psychology Vol. 27, no. 2 (2015), p. 123-131
- Full Text:
- Reviewed:
- Description: The effect of a nonautomated pre-performance routine (PPR) on performance in a high-pressure situation was investigated. Twenty-nine tennis players served in a low- and high-pressure condition in a pre- and posttest design. The intervention group learned a nonautomated PPR for 4 weeks. Increases in subjective but not objective (i.e., cortisol) levels of stress were detected in the high-pressure conditions. The intervention group showed a significant decrease in performance in the high-pressure condition in the pretest (p =.005) but not posttest (p =.161). Using a nonautomated PPR may benefit athletes who experience a drop in performance in high-pressure situations. Copyright © Association for Applied Sport Psychology.
Physical qualities predict change-of-direction speed but not defensive agility in Australian rules football
- Young, Warren, Miller, Ian, Talpey, Scott
- Authors: Young, Warren , Miller, Ian , Talpey, Scott
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 29, no. 1 (2015), p. 206-212
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- Description:
The purpose of this study was to determine the relationships between selected physical qualities, change-ofdirection (COD) speed, and defensive agility performance in Australian Rules football players. Twenty-four male communitylevel players were assessed on sprint acceleration (10-m time), maximum strength (3 repetition-maximum half squat), leg power (countermovement jump), reactive strength (drop jump), and a single COD speed test and a defensive agility test. Change-of-direction speed was correlated with reactive strength (r = 20.645, p = 0.001) and sprint acceleration (r = 0.510, p = 0.011). Multiple regression indicated that the combined physical qualities explained 56.7% of the variance associated with COD speed (adjusted R
2 = 0.567, p ≤ 0.05). Participants were median split into faster and slower COD speed groups, and these were compared by independent t-tests. The faster group was significantly better (p ≤ 0.05) on the sprint acceleration and reactive strength tests (large effect size). The correlations between physical qualities and agility were trivial to small (r = -0.101 to 0.123, p > 0.05) and collectively explained only 14.2% of the variance associated with agility performance (adjusted R2 = -0.142, p > 0.05). When faster and slower agility groups were compared, there were trivial to moderate differences (p > 0.05) in all physical qualities. It was concluded that reactive strength and sprint acceleration are important for COD speed, but the physical qualities assessed are not associated with defensive agility performance. For agility tasks similar to those in this study, sprint and resistance training should not be emphasized, and training other factors, such as the development of sportspecific technique and cognitive skill, is recommended. © 2015 National Strength and Conditioning Association.
- Authors: Young, Warren , Miller, Ian , Talpey, Scott
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 29, no. 1 (2015), p. 206-212
- Full Text:
- Reviewed:
- Description:
The purpose of this study was to determine the relationships between selected physical qualities, change-ofdirection (COD) speed, and defensive agility performance in Australian Rules football players. Twenty-four male communitylevel players were assessed on sprint acceleration (10-m time), maximum strength (3 repetition-maximum half squat), leg power (countermovement jump), reactive strength (drop jump), and a single COD speed test and a defensive agility test. Change-of-direction speed was correlated with reactive strength (r = 20.645, p = 0.001) and sprint acceleration (r = 0.510, p = 0.011). Multiple regression indicated that the combined physical qualities explained 56.7% of the variance associated with COD speed (adjusted R
2 = 0.567, p ≤ 0.05). Participants were median split into faster and slower COD speed groups, and these were compared by independent t-tests. The faster group was significantly better (p ≤ 0.05) on the sprint acceleration and reactive strength tests (large effect size). The correlations between physical qualities and agility were trivial to small (r = -0.101 to 0.123, p > 0.05) and collectively explained only 14.2% of the variance associated with agility performance (adjusted R2 = -0.142, p > 0.05). When faster and slower agility groups were compared, there were trivial to moderate differences (p > 0.05) in all physical qualities. It was concluded that reactive strength and sprint acceleration are important for COD speed, but the physical qualities assessed are not associated with defensive agility performance. For agility tasks similar to those in this study, sprint and resistance training should not be emphasized, and training other factors, such as the development of sportspecific technique and cognitive skill, is recommended. © 2015 National Strength and Conditioning Association.
Socioecological factors potentially associated with participation in physical activity and sport : A longitudinal study of adolescent girls
- Eime, Rochelle, Casey, Meghan, Harvey, Jack, Sawyer, Neroli, Symons, Caroline, Payne, Warren
- Authors: Eime, Rochelle , Casey, Meghan , Harvey, Jack , Sawyer, Neroli , Symons, Caroline , Payne, Warren
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 6 (2015), p. 684-690
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- Description: Objectives: Many adolescents are not physically active enough to receive associated health benefits. Furthermore, participation in physical activity generally declines during adolescence, and to a greater degree for females. Longitudinal research is required to better understand the determinants of change in physical activity by adolescent females to inform physical activity-related policy and practice. This study explored patterns of change in socioecological factors hypothesised to be associated with physical activity and sport, across the adolescent period for females. Methods: This longitudinal study employed three annual surveys of females from metropolitan and non-metropolitan areas recruited in Year 7 (n=328) and Year 11 (n=112). Self-report measures included questions regarding general barriers to participation, as well as factors relating to the socioecological domains. Results: The barriers where significant changes within or differences between cohorts were observed were mostly intrapersonal (lack of energy, lack of time due to other leisure activities). Lack of time was more prevalent in the Year 11 cohort than in the Year 7 cohort. Perceived importance of life priorities mainly related to education and study and more so for the Year 11 cohort. Perceived competence declined for the Year 7 cohort. Support from family and peers trended downwards in both cohorts, whereas access to facilities increased both within and between cohorts. Conclusions: Significant patterns of change in the determinants of physical activity participation were observed across the adolescent period. It is important to consider flexible structure and scheduling of physical activity and strategies to develop competency in childhood and early adolescence. (C) 2014 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
- Authors: Eime, Rochelle , Casey, Meghan , Harvey, Jack , Sawyer, Neroli , Symons, Caroline , Payne, Warren
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 6 (2015), p. 684-690
- Full Text:
- Reviewed:
- Description: Objectives: Many adolescents are not physically active enough to receive associated health benefits. Furthermore, participation in physical activity generally declines during adolescence, and to a greater degree for females. Longitudinal research is required to better understand the determinants of change in physical activity by adolescent females to inform physical activity-related policy and practice. This study explored patterns of change in socioecological factors hypothesised to be associated with physical activity and sport, across the adolescent period for females. Methods: This longitudinal study employed three annual surveys of females from metropolitan and non-metropolitan areas recruited in Year 7 (n=328) and Year 11 (n=112). Self-report measures included questions regarding general barriers to participation, as well as factors relating to the socioecological domains. Results: The barriers where significant changes within or differences between cohorts were observed were mostly intrapersonal (lack of energy, lack of time due to other leisure activities). Lack of time was more prevalent in the Year 11 cohort than in the Year 7 cohort. Perceived importance of life priorities mainly related to education and study and more so for the Year 11 cohort. Perceived competence declined for the Year 7 cohort. Support from family and peers trended downwards in both cohorts, whereas access to facilities increased both within and between cohorts. Conclusions: Significant patterns of change in the determinants of physical activity participation were observed across the adolescent period. It is important to consider flexible structure and scheduling of physical activity and strategies to develop competency in childhood and early adolescence. (C) 2014 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
A seven day running training period increases basal urinary hepcidin levels as compared to cycling
- Sim, Marc, Dawson, Brian, Landers, Grant, Swinkels, Dorine, Tjalsma, Harold, Wiegerinck, Erwin, Trinder, Debbie, Peeling, Peter
- Authors: Sim, Marc , Dawson, Brian , Landers, Grant , Swinkels, Dorine , Tjalsma, Harold , Wiegerinck, Erwin , Trinder, Debbie , Peeling, Peter
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of the International Society of Sports Nutrition Vol. 11, no. 1 (2014), p. 1-9
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- Description: BACKGROUND: This investigation compared the effects of an extended period of weight-bearing (running) vs. non-weight-bearing (cycling) exercise on hepcidin production and its implications for iron status. METHODS: Ten active males performed two separate exercise training blocks with either running (RTB) or cycling (CTB) as the exercise mode. Each block consisted of five training sessions (Day 1, 2, 4, 5, 6) performed over a seven day period that were matched for exercise intensity. Basal venous blood samples were obtained on Day 1 (D1), and on Recovery Days 3 (R3) and 7 (R7) to assess iron status, while basal and 3 h post-exercise urinary hepcidin levels were measured on D1, D2, D6, as well as R3 and R7 (basal levels only) for each condition. RESULTS: Basal urinary hepcidin levels were significantly elevated (p = 0.05) at D2, R3 and R7 as compared to D1 in RTB. Furthermore, 3 h post-exercise urinary hepcidin levels on D1 were also significantly higher in RTB compared to CTB (p = 0.05). In CTB, urinary hepcidin levels were not statistically different on D1 as compared to R7. Iron parameters were not significantly different at D1 compared to R3 and R7 during both conditions. CONCLUSIONS: These results suggest that basal hepcidin levels may increase over the course of an extended training program, especially if a weight-bearing exercise modality is undertaken. However, despite any variations in hepcidin production, serum iron parameters in both RTB and CTB were unaffected, possibly due to the short duration of each training block. In comparing running to cycling, non-weight-bearing activity may require more training sessions, or sessions of extended duration, before any significant changes in basal hepcidin levels appear. Chronic elevations in hepcidin levels may help to explain the high incidence of iron deficiency in athletes.
- Authors: Sim, Marc , Dawson, Brian , Landers, Grant , Swinkels, Dorine , Tjalsma, Harold , Wiegerinck, Erwin , Trinder, Debbie , Peeling, Peter
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of the International Society of Sports Nutrition Vol. 11, no. 1 (2014), p. 1-9
- Full Text:
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- Description: BACKGROUND: This investigation compared the effects of an extended period of weight-bearing (running) vs. non-weight-bearing (cycling) exercise on hepcidin production and its implications for iron status. METHODS: Ten active males performed two separate exercise training blocks with either running (RTB) or cycling (CTB) as the exercise mode. Each block consisted of five training sessions (Day 1, 2, 4, 5, 6) performed over a seven day period that were matched for exercise intensity. Basal venous blood samples were obtained on Day 1 (D1), and on Recovery Days 3 (R3) and 7 (R7) to assess iron status, while basal and 3 h post-exercise urinary hepcidin levels were measured on D1, D2, D6, as well as R3 and R7 (basal levels only) for each condition. RESULTS: Basal urinary hepcidin levels were significantly elevated (p = 0.05) at D2, R3 and R7 as compared to D1 in RTB. Furthermore, 3 h post-exercise urinary hepcidin levels on D1 were also significantly higher in RTB compared to CTB (p = 0.05). In CTB, urinary hepcidin levels were not statistically different on D1 as compared to R7. Iron parameters were not significantly different at D1 compared to R3 and R7 during both conditions. CONCLUSIONS: These results suggest that basal hepcidin levels may increase over the course of an extended training program, especially if a weight-bearing exercise modality is undertaken. However, despite any variations in hepcidin production, serum iron parameters in both RTB and CTB were unaffected, possibly due to the short duration of each training block. In comparing running to cycling, non-weight-bearing activity may require more training sessions, or sessions of extended duration, before any significant changes in basal hepcidin levels appear. Chronic elevations in hepcidin levels may help to explain the high incidence of iron deficiency in athletes.
Abrasion injuries on artificial turf : A real risk or not?
- Twomey, Dara, Petrass, Lauren, Fleming, Paul
- Authors: Twomey, Dara , Petrass, Lauren , Fleming, Paul
- Date: 2014
- Type: Text , Journal article
- Relation: South African Journal of Sports Medicine Vol. 26, no. 3 (2014), p. 91-92
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- Description: Abrasion injuries result in damage only to the surface layer of skin and can result in player discomfort and changes in performance. The perceived fear of abrasion injuries on artificial turf playing surfaces has significantly affected the adoption of these surfaces, particularly in sports that involve frequent player-surface interactions. The underreporting of abrasion injuries due to how time-loss injuries are defined and the lack of validity of the current abrasion measurement device highlight the need for more research to understand fully the incidence and nature of abrasions on artificial turf playing surfaces and the effect of these injuries on playing behaviour. Improved reporting of abrasion injuries and a more biofidelic test device could assist in both the development of abrasion-related injury prevention strategies and in dispelling players’ negative perceptions of abrasions on artificial turf.
- Authors: Twomey, Dara , Petrass, Lauren , Fleming, Paul
- Date: 2014
- Type: Text , Journal article
- Relation: South African Journal of Sports Medicine Vol. 26, no. 3 (2014), p. 91-92
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- Description: Abrasion injuries result in damage only to the surface layer of skin and can result in player discomfort and changes in performance. The perceived fear of abrasion injuries on artificial turf playing surfaces has significantly affected the adoption of these surfaces, particularly in sports that involve frequent player-surface interactions. The underreporting of abrasion injuries due to how time-loss injuries are defined and the lack of validity of the current abrasion measurement device highlight the need for more research to understand fully the incidence and nature of abrasions on artificial turf playing surfaces and the effect of these injuries on playing behaviour. Improved reporting of abrasion injuries and a more biofidelic test device could assist in both the development of abrasion-related injury prevention strategies and in dispelling players’ negative perceptions of abrasions on artificial turf.
Changes in muscle activation following balance and technique training and a season of Australian football
- Donnelly, Cyril, Elliott, Bruce, Doyle, Tim, Finch, Caroline, Dempsey, Alasdair, Lloyd, David
- Authors: Donnelly, Cyril , Elliott, Bruce , Doyle, Tim , Finch, Caroline , Dempsey, Alasdair , Lloyd, David
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 3 (2014), p.348-352
- Relation: http://purl.org/au-research/grants/nhmrc/565900
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- Description: Objectives: Determine if balance and technique training implemented adjunct to 1001 male Australian football players' training influenced the activation/strength of the muscles crossing the knee during pre-planned and unplanned sidestepping. Design: Randomized Control Trial. Methods: Each Australian football player participated in either 28 weeks of balance and technique training or 'sham' training. Twenty-eight Australian football players (balance and technique training, n = 12; 'sham' training, n = 16) completed biomechanical testing pre-to-post training. Peak knee moments and directed co-contraction ratios in three degrees of freedom, as well as total muscle activation were calculated during pre-planned and unplanned sidestepping. Results: No significant differences in muscle activation/strength were observed between the 'sham' training and balance and technique training groups. Following a season of Australian football, knee extensor (p = 0.023) and semimembranosus (p = 0.006) muscle activation increased during both pre-planned sidestepping and unplanned sidestepping. Following a season of Australian football, total muscle activation was 30% lower and peak valgus knee moments 80% greater (p = 0.022) during unplanned sidestepping when compared with pre-planned sidestepping. Conclusions: When implemented in a community level training environment, balance and technique training was not effective in changing the activation of the muscles crossing the knee during sidestepping. Following a season of Australian football, players are better able to support both frontal and sagittal plane knee moments. When compared to pre-planned sidestepping, Australian football players may be at increased risk of anterior cruciate ligament injury during unplanned sidestepping in the latter half of an Australian football season.
- Authors: Donnelly, Cyril , Elliott, Bruce , Doyle, Tim , Finch, Caroline , Dempsey, Alasdair , Lloyd, David
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 3 (2014), p.348-352
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: Objectives: Determine if balance and technique training implemented adjunct to 1001 male Australian football players' training influenced the activation/strength of the muscles crossing the knee during pre-planned and unplanned sidestepping. Design: Randomized Control Trial. Methods: Each Australian football player participated in either 28 weeks of balance and technique training or 'sham' training. Twenty-eight Australian football players (balance and technique training, n = 12; 'sham' training, n = 16) completed biomechanical testing pre-to-post training. Peak knee moments and directed co-contraction ratios in three degrees of freedom, as well as total muscle activation were calculated during pre-planned and unplanned sidestepping. Results: No significant differences in muscle activation/strength were observed between the 'sham' training and balance and technique training groups. Following a season of Australian football, knee extensor (p = 0.023) and semimembranosus (p = 0.006) muscle activation increased during both pre-planned sidestepping and unplanned sidestepping. Following a season of Australian football, total muscle activation was 30% lower and peak valgus knee moments 80% greater (p = 0.022) during unplanned sidestepping when compared with pre-planned sidestepping. Conclusions: When implemented in a community level training environment, balance and technique training was not effective in changing the activation of the muscles crossing the knee during sidestepping. Following a season of Australian football, players are better able to support both frontal and sagittal plane knee moments. When compared to pre-planned sidestepping, Australian football players may be at increased risk of anterior cruciate ligament injury during unplanned sidestepping in the latter half of an Australian football season.
Exercise : Putting action into our epigenome
- Denham, Joshua, Marques, Francine, O'Brien, Brendan, Charchar, Fadi
- Authors: Denham, Joshua , Marques, Francine , O'Brien, Brendan , Charchar, Fadi
- Date: 2014
- Type: Text , Journal article
- Relation: Sports Medicine Vol. 44, no. 2 (2014), p. 189-209
- Relation: http://purl.org/au-research/grants/nhmrc/1009490
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- Description: Most human phenotypes are influenced by a combination of genomic and environmental factors. Engaging in regular physical exercise prevents many chronic diseases, decreases mortality risk and increases longevity. However, the mechanisms involved are poorly understood. The modulating effect of physical (aerobic and resistance) exercise on gene expression has been known for some time now and has provided us with an understanding of the biological responses to physical exercise. Emerging research data suggest that epigenetic modifications are extremely important for both development and disease in humans. In the current review, we summarise findings on the effect of exercise on epigenetic modifications and their effects on gene expression. Current research data suggest epigenetic modifications (DNA methylation and histone acetylation) and microRNAs (miRNAs) are responsive to acute aerobic and resistance exercise in brain, blood, skeletal and cardiac muscle, adipose tissue and even buccal cells. Six months of aerobic exercise alters whole-genome DNA methylation in skeletal muscle and adipose tissue and directly influences lipogenesis. Some miRNAs are related to maximal oxygen consumption (VO 2max) and VO2max trainability, and are differentially expressed amongst individuals with high and low VO2max. Remarkably, miRNA expression profiles discriminate between low and high responders to resistance exercise (miR-378, -26a, -29a and -451) and correlate to gains in lean body mass (miR-378). The emerging field of exercise epigenomics is expected to prosper and additional studies may elucidate the clinical relevance of miRNAs and epigenetic modifications, and delineate mechanisms by which exercise confers a healthier phenotype and improves performance. © 2013 Springer International Publishing Switzerland. Funded by NHMRC; National Health and Medical Research Council
Investigation of older adults’ participation in exercises following completion of a state-wide survey targeting evidence-based falls prevention strategies
- Lee, Den-Ching, Day, Lesley, Finch, Caroline, Hill, Keith, Clemson, Lindy, McDermott, Fiona, Haines, Terry
- Authors: Lee, Den-Ching , Day, Lesley , Finch, Caroline , Hill, Keith , Clemson, Lindy , McDermott, Fiona , Haines, Terry
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Aging and Physical Activity Vol.23, no.2 (2014), p.256-263
- Relation: http://purl.org/au-research/grants/nhmrc/565900
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- Description: This paper examines whether involvement in an observational study may prompt participants to change their exercise behaviors. Data was collected from 394 older community dwellers in Victoria, Australia using a baseline survey, and 245 of these participated in a follow-up survey one year later. Survey domains were drawn from constructs of relevant health behavior models. Results showed that the proportion of respondents who were currently participating in exercises to prevent falls at follow-up was 12% higher than at baseline (Wilcoxon p value<0.001). Twenty-nine percent reported they had changed their perceptions about falls and their risk of falls, with comments focused on threat appraisal. Forty-four percent reported having taken strategies to reduce their risk of falling, with comments based on implementation of different preventive strategies. Respondents who held favorable views towards exercises for the prevention of falls appear to change their behaviors that might address falls when participating in observational studies.
- Authors: Lee, Den-Ching , Day, Lesley , Finch, Caroline , Hill, Keith , Clemson, Lindy , McDermott, Fiona , Haines, Terry
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Aging and Physical Activity Vol.23, no.2 (2014), p.256-263
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: This paper examines whether involvement in an observational study may prompt participants to change their exercise behaviors. Data was collected from 394 older community dwellers in Victoria, Australia using a baseline survey, and 245 of these participated in a follow-up survey one year later. Survey domains were drawn from constructs of relevant health behavior models. Results showed that the proportion of respondents who were currently participating in exercises to prevent falls at follow-up was 12% higher than at baseline (Wilcoxon p value<0.001). Twenty-nine percent reported they had changed their perceptions about falls and their risk of falls, with comments focused on threat appraisal. Forty-four percent reported having taken strategies to reduce their risk of falling, with comments based on implementation of different preventive strategies. Respondents who held favorable views towards exercises for the prevention of falls appear to change their behaviors that might address falls when participating in observational studies.
- Joseph, Corey, Bradshaw, Elizabeth, Kemp, Justin, Clark, Ross
- Authors: Joseph, Corey , Bradshaw, Elizabeth , Kemp, Justin , Clark, Ross
- Date: 2014
- Type: Text , Journal article
- Relation: Sports Biomechanics Vol. 13, no. 3 (2014), p. 241-258
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- Description: Eccentric contractions that provide spring energy can also cause muscle damage. The aim of this study was to explore leg and vertical stiffness following muscle damage induced by an eccentric exercise protocol. Twenty active males completed 60 minutes of backward-walking on a treadmill at 0.67 m/s and a gradient of − 8.5° to induce muscle damage. Tests were performed immediately before; immediately post; and 24, 48, and 168 hours post eccentric exercise. Tests included running at 3.35 m/s and hopping at 2.2 Hz using single- and double-legged actions. Leg and vertical stiffness were measured from kinetic and kinematic data, and electromyography (EMG) of five muscles of the preferred limb were recorded during hopping. Increases in pain scores (over 37%) occurred post-exercise and 24 and 48 hours later (p < 0.001). A 7% decrease in maximal voluntary contraction occurred immediately post-exercise (p = 0.019). Changes in knee kinematics during single-legged hopping were observed 168 hours post (p < 0.05). No significant changes were observed in EMG, creatine kinase activity, leg, or vertical stiffness. Results indicate that knee mechanics may be altered to maintain consistent levels of leg and vertical stiffness when eccentric exercise-induced muscle damage is present in the lower legs. © 2014 Taylor & Francis.
The acute effects of conventional, complex, and contrast protocols on lower-body power
- Talpey, Scott, Young, Warren, Saunders, Natalie
- Authors: Talpey, Scott , Young, Warren , Saunders, Natalie
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 28, no. 2 (February 2014 2014), p. 361-366
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- Description: Talpey, SW, Young, WB, and Saunders, N. The acute effects of conventional, complex, and contrast protocols on lowerbody power. J Strength Cond Res 28(2): 361-366, 2014- This study compared conventional, complex, and contrast protocols on peak power (PP) output. Static vs. dynamic contractions were also manipulated to determine the effect of these confounding variables. Eighteen recreationally trained men [age, 21.1 ± 3.3 years; body mass, 81.7 ± 15.9 kg; height, 182.8 ± 6.2 cm; 5 repetition maximum (5RM) half back squat, 119.2 ± 25.4 kg; 5RM/BW, 1.5 ± 0.2 kg] involved in sports including Australian Rules football, basketball, soccer, and rugby participated in this investigation. Five protocols were executed in a randomized order, a conventional protocol in which 3 sets of 4 countermovement jumps (CMJs) were performed 2 minutes apart. Contrast protocols using a heavy resistance conditioning action of either 4 repetitions with a 5RM load or a 5-second static back squat were alternated with sets of 4 CMJs. Complex conditions with 3 sets of 4 repetitions of a 5RM back squat or a 5-second static back squat were performed before the 3 sets of CMJs. In all conditions, 4 minutes of rest followed sets of heavy resistance exercises and 2 minutes of rest followed each set of CMJs. Individual set means and a total session mean were calculated from each CMJ performed during the session. Results showed that the conventional protocol produced significantly greater PP than all conditions except for the dynamic complex and the static contrast. Results suggest that the use of the complex and contrast protocols used in this investigation should not be used for acute increases in lower-body PP in recreationally trained individuals.
- Authors: Talpey, Scott , Young, Warren , Saunders, Natalie
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 28, no. 2 (February 2014 2014), p. 361-366
- Full Text:
- Reviewed:
- Description: Talpey, SW, Young, WB, and Saunders, N. The acute effects of conventional, complex, and contrast protocols on lowerbody power. J Strength Cond Res 28(2): 361-366, 2014- This study compared conventional, complex, and contrast protocols on peak power (PP) output. Static vs. dynamic contractions were also manipulated to determine the effect of these confounding variables. Eighteen recreationally trained men [age, 21.1 ± 3.3 years; body mass, 81.7 ± 15.9 kg; height, 182.8 ± 6.2 cm; 5 repetition maximum (5RM) half back squat, 119.2 ± 25.4 kg; 5RM/BW, 1.5 ± 0.2 kg] involved in sports including Australian Rules football, basketball, soccer, and rugby participated in this investigation. Five protocols were executed in a randomized order, a conventional protocol in which 3 sets of 4 countermovement jumps (CMJs) were performed 2 minutes apart. Contrast protocols using a heavy resistance conditioning action of either 4 repetitions with a 5RM load or a 5-second static back squat were alternated with sets of 4 CMJs. Complex conditions with 3 sets of 4 repetitions of a 5RM back squat or a 5-second static back squat were performed before the 3 sets of CMJs. In all conditions, 4 minutes of rest followed sets of heavy resistance exercises and 2 minutes of rest followed each set of CMJs. Individual set means and a total session mean were calculated from each CMJ performed during the session. Results showed that the conventional protocol produced significantly greater PP than all conditions except for the dynamic complex and the static contrast. Results suggest that the use of the complex and contrast protocols used in this investigation should not be used for acute increases in lower-body PP in recreationally trained individuals.
When 'just doing it' is not enough: Assessing the fidelity of player performance of an injury prevention exercise program
- Fortington, Lauren, Donaldson, Alex, Lathlean, Tim, Young, Warren, Gabbe, Belinda, Lloyd, David, Finch, Caroline
- Authors: Fortington, Lauren , Donaldson, Alex , Lathlean, Tim , Young, Warren , Gabbe, Belinda , Lloyd, David , Finch, Caroline
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 3 (May 2014 2014), p.272-277
- Relation: http://purl.org/au-research/grants/nhmrc/565907
- Relation: http://purl.org/au-research/grants/nhmrc/1058737
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: Objectives: To obtain benefits from sports injury prevention programs, players are instructed to perform the exercises as prescribed. We developed an observational checklist to measure the quality of exercise performance by players participating in FootyFirst, a coach-led, exercise-based, lower-limb injury prevention program in community Australian Football (AF). Design: Observational. Methods: The essential performance criteria for each FootyFirst exercise were described in terms of the technique, volume and intensity required to perform each exercise. An observational checklist was developed to evaluate each criterion through direct visual observation of players at training. The checklist was trialled by two independent raters who observed the same 70 players completing the exercises at eight clubs. Agreement between observers was assessed by Kappa-statistics. Exercise fidelity was defined as the proportion of observed players who performed all aspects of their exercises correctly. Results: The raters agreed on 61/70 observations (87%) (Kappa = 0.72, 95% CI: 0.55; 0.89). Of the observations with agreed ratings, 41 (67%) players were judged as performing the exercises as prescribed. Conclusions: The observational checklist demonstrated high inter-rater reliability. Many players observed did not perform the exercises as prescribed, raising concern as to whether they would be receiving anticipated program benefits. Where quality of exercise performance is important, evaluation and reporting of program fidelity should include direct observations of participants.
- Authors: Fortington, Lauren , Donaldson, Alex , Lathlean, Tim , Young, Warren , Gabbe, Belinda , Lloyd, David , Finch, Caroline
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 3 (May 2014 2014), p.272-277
- Relation: http://purl.org/au-research/grants/nhmrc/565907
- Relation: http://purl.org/au-research/grants/nhmrc/1058737
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: Objectives: To obtain benefits from sports injury prevention programs, players are instructed to perform the exercises as prescribed. We developed an observational checklist to measure the quality of exercise performance by players participating in FootyFirst, a coach-led, exercise-based, lower-limb injury prevention program in community Australian Football (AF). Design: Observational. Methods: The essential performance criteria for each FootyFirst exercise were described in terms of the technique, volume and intensity required to perform each exercise. An observational checklist was developed to evaluate each criterion through direct visual observation of players at training. The checklist was trialled by two independent raters who observed the same 70 players completing the exercises at eight clubs. Agreement between observers was assessed by Kappa-statistics. Exercise fidelity was defined as the proportion of observed players who performed all aspects of their exercises correctly. Results: The raters agreed on 61/70 observations (87%) (Kappa = 0.72, 95% CI: 0.55; 0.89). Of the observations with agreed ratings, 41 (67%) players were judged as performing the exercises as prescribed. Conclusions: The observational checklist demonstrated high inter-rater reliability. Many players observed did not perform the exercises as prescribed, raising concern as to whether they would be receiving anticipated program benefits. Where quality of exercise performance is important, evaluation and reporting of program fidelity should include direct observations of participants.
Autonomic cardiovascular response to acute hypoxia and passive head-up tilting in humans
- Brown, Stephen, Raman, Aaron, Barnes, Matthew, Mündel, Toby
- Authors: Brown, Stephen , Raman, Aaron , Barnes, Matthew , Mündel, Toby
- Date: 2013
- Type: Text , Journal article
- Relation: European Journal of Applied Physiology Vol. 113, no. 7 (2013), p. 1731-1736
- Full Text:
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- Description: Acute hypoxia may alter autonomic cardiovascular reflexes during orthostasis. Heart rate variability (HRV), arterial blood pressure (MAP), and respiratory sinus arrhythmia (RSA) were recorded during supine (SUP) and passive head up tilt (HUT) in eight healthy humans, spontaneously breathing either room air or 10 % O2 in N2. In the time domain, heart rate increased and variability decreased with HUT in both trials, with no difference between trials. In the frequency domain, normalized low frequency HRV increased, and normalized high frequency HRV decreased with HUT in both trials, with no difference between trials. MAP was 74.9 (8.6) and 77.5 (11.7) mmHg when SUP in the room air and hypoxia trials, respectively. A significant increase in MAP occurred with HUT in the room air trial but not in the hypoxia trial. In both trials, end tidal CO2 decreased with HUT, with no difference between trials. In the room air trial, end tidal O2 increased with HUT, whereas during the hypoxia trial, end tidal O2 decreased with HUT. The distribution of heart beats relative to the phase of ventilation (%HB IN and %HBOUT) was similar in both trials: the %HB IN was 43.5 (3.3) % and %HBOUT was 56.5 (4.2) % breathing room air when SUP, and 45.5 (3.0) and 54.5 (3.2) when hypoxic and SUP. For both trials, this distribution did not change with HUT. As both HRV and RSA showed similar responses to HUT when spontaneously breathing either room air or 10 % O2 in N2, we suggest that autonomic cardiovascular reflexes are preserved during acute hypoxia. © 2013 Springer-Verlag Berlin Heidelberg.
- Description: 2003011125
- Authors: Brown, Stephen , Raman, Aaron , Barnes, Matthew , Mündel, Toby
- Date: 2013
- Type: Text , Journal article
- Relation: European Journal of Applied Physiology Vol. 113, no. 7 (2013), p. 1731-1736
- Full Text:
- Reviewed:
- Description: Acute hypoxia may alter autonomic cardiovascular reflexes during orthostasis. Heart rate variability (HRV), arterial blood pressure (MAP), and respiratory sinus arrhythmia (RSA) were recorded during supine (SUP) and passive head up tilt (HUT) in eight healthy humans, spontaneously breathing either room air or 10 % O2 in N2. In the time domain, heart rate increased and variability decreased with HUT in both trials, with no difference between trials. In the frequency domain, normalized low frequency HRV increased, and normalized high frequency HRV decreased with HUT in both trials, with no difference between trials. MAP was 74.9 (8.6) and 77.5 (11.7) mmHg when SUP in the room air and hypoxia trials, respectively. A significant increase in MAP occurred with HUT in the room air trial but not in the hypoxia trial. In both trials, end tidal CO2 decreased with HUT, with no difference between trials. In the room air trial, end tidal O2 increased with HUT, whereas during the hypoxia trial, end tidal O2 decreased with HUT. The distribution of heart beats relative to the phase of ventilation (%HB IN and %HBOUT) was similar in both trials: the %HB IN was 43.5 (3.3) % and %HBOUT was 56.5 (4.2) % breathing room air when SUP, and 45.5 (3.0) and 54.5 (3.2) when hypoxic and SUP. For both trials, this distribution did not change with HUT. As both HRV and RSA showed similar responses to HUT when spontaneously breathing either room air or 10 % O2 in N2, we suggest that autonomic cardiovascular reflexes are preserved during acute hypoxia. © 2013 Springer-Verlag Berlin Heidelberg.
- Description: 2003011125
Change in health-related quality of life in the first 18 months after lower limb amputation: A prospective, longitudinal study
- Fortington, Lauren, Dijkstra, Pieter, Bosmans, Joline, Post, Wendy, Geertzen, Jan
- Authors: Fortington, Lauren , Dijkstra, Pieter , Bosmans, Joline , Post, Wendy , Geertzen, Jan
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Rehabilitation Medicine Vol. 45, no. 6 (2013), p. 587-594
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- Description: Objective: To describe changes in health-related quality of life in people with lower limb amputation, from time of amputation to 18 months, taking into consideration the influence of age and walking distance. In addition, quality of life for people with amputation is compared with the Dutch population norm values. Design: Multicentre, longitudinal study. Subjects: All people undergoing first amputation: 106 were referred, of whom 82 were included, mean age 67.8 years (standard deviation; SD 13.0), 67% men. A total of 35 remained in the study at 18 months. Methods: Dutch language RAND-36 questionnaire (Research and Development Corporation measure of Quality of Life) was completed at time of amputation, 6 and 18 months after amputation. Results: Over time, a significant improvement was seen in physical function, social function, pain, vitality, and perceived change in health (all p < 0.001). Subjects over 65 years of age had a poorer outcome compared with people < 65 years for physical function only (p < 0.001). Walking distance was associated with improved scores in social function (p = 0.047). Conclusion: Quality of life improved significantly in 5 of 7 domains investigated; most change occurred in the first 6 months. Physical function remained well below population norm values. Different domains may be affected in different ways for older and younger age groups, but this requires further research. © 2013 Foundation of Rehabilitation Information.
- Description: C1
- Authors: Fortington, Lauren , Dijkstra, Pieter , Bosmans, Joline , Post, Wendy , Geertzen, Jan
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Rehabilitation Medicine Vol. 45, no. 6 (2013), p. 587-594
- Full Text:
- Reviewed:
- Description: Objective: To describe changes in health-related quality of life in people with lower limb amputation, from time of amputation to 18 months, taking into consideration the influence of age and walking distance. In addition, quality of life for people with amputation is compared with the Dutch population norm values. Design: Multicentre, longitudinal study. Subjects: All people undergoing first amputation: 106 were referred, of whom 82 were included, mean age 67.8 years (standard deviation; SD 13.0), 67% men. A total of 35 remained in the study at 18 months. Methods: Dutch language RAND-36 questionnaire (Research and Development Corporation measure of Quality of Life) was completed at time of amputation, 6 and 18 months after amputation. Results: Over time, a significant improvement was seen in physical function, social function, pain, vitality, and perceived change in health (all p < 0.001). Subjects over 65 years of age had a poorer outcome compared with people < 65 years for physical function only (p < 0.001). Walking distance was associated with improved scores in social function (p = 0.047). Conclusion: Quality of life improved significantly in 5 of 7 domains investigated; most change occurred in the first 6 months. Physical function remained well below population norm values. Different domains may be affected in different ways for older and younger age groups, but this requires further research. © 2013 Foundation of Rehabilitation Information.
- Description: C1
Characteristics of Polar Opposites : An Exploratory Investigation of Choking-Resistant and Choking-Susceptible Athletes
- Mesagno, Christopher, Marchant, Daryl
- Authors: Mesagno, Christopher , Marchant, Daryl
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Applied Sport Psychology Vol. 25, no. 1 (2013), p. 72-91
- Full Text:
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- Description: The current research provides an assessment of performance under pressure by deliberately investigating responses of athletes who are polar opposite. Forty-six female netball players were screened to sample choking-resistant and choking-susceptible athletes. The eight selected participants then completed 180 netball shots in a single-case A1-B-A2 design (A phases = low-pressure and B phase = high-pressure), with follow-up interviews. Under pressure, choking-resistant participants improved their performance by using task-focus and avoidance-cognitive coping, whereas choking-susceptible participants suffered from performance decrements often applying emotion-focused and approach-cognitive coping. Researchers should further explore the unique characteristics of choking-resistant athletes. © 2013 Copyright Taylor and Francis Group, LLC.
- Description: 2003010585
- Authors: Mesagno, Christopher , Marchant, Daryl
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Applied Sport Psychology Vol. 25, no. 1 (2013), p. 72-91
- Full Text:
- Reviewed:
- Description: The current research provides an assessment of performance under pressure by deliberately investigating responses of athletes who are polar opposite. Forty-six female netball players were screened to sample choking-resistant and choking-susceptible athletes. The eight selected participants then completed 180 netball shots in a single-case A1-B-A2 design (A phases = low-pressure and B phase = high-pressure), with follow-up interviews. Under pressure, choking-resistant participants improved their performance by using task-focus and avoidance-cognitive coping, whereas choking-susceptible participants suffered from performance decrements often applying emotion-focused and approach-cognitive coping. Researchers should further explore the unique characteristics of choking-resistant athletes. © 2013 Copyright Taylor and Francis Group, LLC.
- Description: 2003010585
Comparison of agility demands of small-sided games in elite Australian football
- Davies, Michael, Young, Warren, Farrow, Damian, Bahnert, Andrew
- Authors: Davies, Michael , Young, Warren , Farrow, Damian , Bahnert, Andrew
- Date: 2013
- Type: Text , Journal article
- Relation: International Journal of Sports Physiology and Performance Vol. 8, no. 2 (2013), p. 139-147
- Full Text:
- Reviewed:
- Description: Purpose: To compare the agility demands of 4 small-sided games (SSGs) and evaluate the variability in demands for elite Australian Football (AF). Methods: Fourteen male elite Australian Football League (AFL) players (mean ± SD; 21.7 ± 3.1 y, 189.6 ± 9.0 cm, 88.7 ± 10.0 kg, 39.4 ± 57.1 games) completed 4 SSGs of 3 x 45-s bouts each with modified designs. Video notational analysis, GPS at 5 Hz, and triaxial accelerometer data expressed the external player loads within games. Three comparisons were made using a paired t test (P < .05), and magnitudes of differences were reported with effect size (ES) statistics. Results: Reduced area per player (increased density) produced a small increase in total agility maneuvers (SSG1, 7.2 ± 1.3; SSG2, 8.8 ± 4.1), while a large 2D player load was accumulated (P < .05, ES = 1.22). A reduction in players produced a moderate (ES = 0.60) total number of agility maneuvers (SSG 3, 11.3 ± 6.1; SSG 2, 8.3 ± 3.6); however, a greater variability was found. The implementation of a 2-handed-tag rule resulted in a somewhat trivial decline (P > .05, ES = 0.16) in agility events compared with normal AFL tackling rules (SSG 2, 8.3 ± 3.6; SSG 4, 7.8 ± 2.6). Conclusions: SSG characteristics can influence agility-training demand, which can vary considerably for individuals. Coaches should carefully consider SSG design to maximize the potential to develop agility for all players. © 2013 Human Kinetics, Inc.
- Description: 2003010585
- Authors: Davies, Michael , Young, Warren , Farrow, Damian , Bahnert, Andrew
- Date: 2013
- Type: Text , Journal article
- Relation: International Journal of Sports Physiology and Performance Vol. 8, no. 2 (2013), p. 139-147
- Full Text:
- Reviewed:
- Description: Purpose: To compare the agility demands of 4 small-sided games (SSGs) and evaluate the variability in demands for elite Australian Football (AF). Methods: Fourteen male elite Australian Football League (AFL) players (mean ± SD; 21.7 ± 3.1 y, 189.6 ± 9.0 cm, 88.7 ± 10.0 kg, 39.4 ± 57.1 games) completed 4 SSGs of 3 x 45-s bouts each with modified designs. Video notational analysis, GPS at 5 Hz, and triaxial accelerometer data expressed the external player loads within games. Three comparisons were made using a paired t test (P < .05), and magnitudes of differences were reported with effect size (ES) statistics. Results: Reduced area per player (increased density) produced a small increase in total agility maneuvers (SSG1, 7.2 ± 1.3; SSG2, 8.8 ± 4.1), while a large 2D player load was accumulated (P < .05, ES = 1.22). A reduction in players produced a moderate (ES = 0.60) total number of agility maneuvers (SSG 3, 11.3 ± 6.1; SSG 2, 8.3 ± 3.6); however, a greater variability was found. The implementation of a 2-handed-tag rule resulted in a somewhat trivial decline (P > .05, ES = 0.16) in agility events compared with normal AFL tackling rules (SSG 2, 8.3 ± 3.6; SSG 4, 7.8 ± 2.6). Conclusions: SSG characteristics can influence agility-training demand, which can vary considerably for individuals. Coaches should carefully consider SSG design to maximize the potential to develop agility for all players. © 2013 Human Kinetics, Inc.
- Description: 2003010585
Could targeted exercise programmes prevent lower limb injury in community Australian football?
- Andrew, Nadine, Gabbe, Belinda, Cook, Jill, Lloyd, David, Donnelly, Cyril, Nash, Clare, Finch, Caroline
- Authors: Andrew, Nadine , Gabbe, Belinda , Cook, Jill , Lloyd, David , Donnelly, Cyril , Nash, Clare , Finch, Caroline
- Date: 2013
- Type: Text , Journal article
- Relation: Sports Medicine Vol. 43, no. 8 (2013), p. 751-763
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Relation: http://purl.org/au-research/grants/nhmrc/565907
- Full Text:
- Reviewed:
- Description: Background: Australian football is a popular sport in Australia, at both the community and elite levels. It is a high-speed contact sport with a higher incidence of medically treated injuries when compared with most other organized sports. Hamstring injuries, ligament injuries to the knee or ankle, hip/groin injuries and tendinopathies are particularly common and often result in considerable time lost from sport. Consequently, the prevention of lower limb injuries is a priority for both community and elite Australian football organizations. There is considerable literature available on exercise programmes aimed at reducing lower limb injuries in Australian football and other running-related sports. The quality and outcomes of these studies have varied considerably, but indicate that exercise protocols may be an effective means of preventing lower limb injuries. Despite this, there has been limited high-quality and systematic evaluation of these data. Objective: The aim of this literature review is to systematically evaluate the evidence about the benefits of lower limb injury prevention exercise protocols aimed at reducing the most common severe lower limb injuries in Australian football. Methods: The Cochrane Central Register of Controlled Trials, the Cochrane Bone Joint and Muscle Trauma Group Specialized Register, MEDLINE and other electronic databases were searched, from January 1990 to December 2010. Papers reporting the results of randomized controlled trials (RCTs), quasi-RCTs, cohort and case-control studies were extracted. Primary outcomes were injury reduction or risk factor identification and/or modification. Secondary outcomes were adherence to any trialled interventions, injury severity and adverse effects such as secondary injuries and muscle soreness. The methodological quality of extracted manuscripts was assessed and results were collated. Results: Forty-seven papers were identified and reviewed of which 18 related to hamstring injury, eight related to knee or ankle ligament injury, five related to tendon injury and four were hip or groin injury related. Another 12 papers targeted general lower limb injuries. Most (n = 27 [57 %]) were observational studies, investigating injury risk factors. Twenty reported the results of intervention trials. Of these, 15 were efficacy trials reporting the effects of an intervention in reducing injury rates, four were biomechanical interventions in which the impact of the intervention on a known injury risk factor was assessed and one reported changes in injury risk factors as well as injury rates. The strength of the evidence base for exercise programmes for lower limb injury prevention was found to be limited, primarily due to the research methods employed, low adherence to interventions by the study participants and a lack of statistical power. Limited evidence obtained from a small number of RCTs suggests that balance and control exercises might be efficacious in preventing ankle ligament injuries and a programme involving a combination of balance and control exercises, eccentric hamstring, plyometrics and strength exercises could be efficacious in preventing all lower limb injuries. Conclusions: Overall, the evidence for exercise programmes as an efficacious lower limb injury prevention strategy is predominantly restricted to studies addressing injury aetiology and mechanisms. The findings of this review highlight the need to develop and test interventions in well designed population-based trials with an emphasis on promoting intervention uptake and adherence and, hence, intervention effectiveness. The results of this review can inform the development of the components of a future lower limb injury prevention exercise protocol for community-level Australian football. © 2013 Springer International Publishing Switzerland. Funded by the NHMRC.
- Description: 2003011215
- Authors: Andrew, Nadine , Gabbe, Belinda , Cook, Jill , Lloyd, David , Donnelly, Cyril , Nash, Clare , Finch, Caroline
- Date: 2013
- Type: Text , Journal article
- Relation: Sports Medicine Vol. 43, no. 8 (2013), p. 751-763
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Relation: http://purl.org/au-research/grants/nhmrc/565907
- Full Text:
- Reviewed:
- Description: Background: Australian football is a popular sport in Australia, at both the community and elite levels. It is a high-speed contact sport with a higher incidence of medically treated injuries when compared with most other organized sports. Hamstring injuries, ligament injuries to the knee or ankle, hip/groin injuries and tendinopathies are particularly common and often result in considerable time lost from sport. Consequently, the prevention of lower limb injuries is a priority for both community and elite Australian football organizations. There is considerable literature available on exercise programmes aimed at reducing lower limb injuries in Australian football and other running-related sports. The quality and outcomes of these studies have varied considerably, but indicate that exercise protocols may be an effective means of preventing lower limb injuries. Despite this, there has been limited high-quality and systematic evaluation of these data. Objective: The aim of this literature review is to systematically evaluate the evidence about the benefits of lower limb injury prevention exercise protocols aimed at reducing the most common severe lower limb injuries in Australian football. Methods: The Cochrane Central Register of Controlled Trials, the Cochrane Bone Joint and Muscle Trauma Group Specialized Register, MEDLINE and other electronic databases were searched, from January 1990 to December 2010. Papers reporting the results of randomized controlled trials (RCTs), quasi-RCTs, cohort and case-control studies were extracted. Primary outcomes were injury reduction or risk factor identification and/or modification. Secondary outcomes were adherence to any trialled interventions, injury severity and adverse effects such as secondary injuries and muscle soreness. The methodological quality of extracted manuscripts was assessed and results were collated. Results: Forty-seven papers were identified and reviewed of which 18 related to hamstring injury, eight related to knee or ankle ligament injury, five related to tendon injury and four were hip or groin injury related. Another 12 papers targeted general lower limb injuries. Most (n = 27 [57 %]) were observational studies, investigating injury risk factors. Twenty reported the results of intervention trials. Of these, 15 were efficacy trials reporting the effects of an intervention in reducing injury rates, four were biomechanical interventions in which the impact of the intervention on a known injury risk factor was assessed and one reported changes in injury risk factors as well as injury rates. The strength of the evidence base for exercise programmes for lower limb injury prevention was found to be limited, primarily due to the research methods employed, low adherence to interventions by the study participants and a lack of statistical power. Limited evidence obtained from a small number of RCTs suggests that balance and control exercises might be efficacious in preventing ankle ligament injuries and a programme involving a combination of balance and control exercises, eccentric hamstring, plyometrics and strength exercises could be efficacious in preventing all lower limb injuries. Conclusions: Overall, the evidence for exercise programmes as an efficacious lower limb injury prevention strategy is predominantly restricted to studies addressing injury aetiology and mechanisms. The findings of this review highlight the need to develop and test interventions in well designed population-based trials with an emphasis on promoting intervention uptake and adherence and, hence, intervention effectiveness. The results of this review can inform the development of the components of a future lower limb injury prevention exercise protocol for community-level Australian football. © 2013 Springer International Publishing Switzerland. Funded by the NHMRC.
- Description: 2003011215
Do physical capacity and interchange rest periods influence match exercise-intensity profile in Australian football?
- Mooney, Mitchell, Cormack, Stuart, O'Brien, Brendan, Coutts, Aaron
- Authors: Mooney, Mitchell , Cormack, Stuart , O'Brien, Brendan , Coutts, Aaron
- Date: 2013
- Type: Text , Journal article
- Relation: International Journal of Sports Physiology and Performance Vol. 8, no. 2 (2013), p. 165-172
- Full Text:
- Reviewed:
- Description: Purpose: The purpose of this study was to determine if Yo-Yo Intermittent Recovery level 2 (Yo-Yo IR2) and the number of interchange rotations affected the match activity profile of elite Australian footballers. Method: Fifteen elite Australian footballers completed the Yo-Yo IR2 before the beginning of the season and played across 22 matches in which match activity profiles were measured via microtechnology devices containing a global positioning system (GPS) and accelerometer. An interchange rotation was counted when a player left the field and was replaced with another player. Yo-Yo IR2 results were further split into high and low groups. Results: Players match speed decreased from 1st to 4th quarter, while average-speed (m/min: P = .05) and low-speed activity (LSA, <15 km/h) per minute (LSA m/min; P = .06) significantly decreased in the 2nd half. Yo-Yo IR2 influenced the amount of m/min, high-speed running (HSR, >15 km/h) per minute (HSR m/min) and accelerometer load/min throughout the entire match. The number of interchanges significantly influenced the HSR m/min and m/min throughout the match except in the 2nd quarter. Furthermore, the low Yo-Yo IR2 group had significantly less LSA m/min in the 4th quarter than the high Yo-Yo IR2 group (92.2 vs 96.7 m/ min, P = .06). Conclusions: Both the Yo-Yo IR2 and number of interchanges contribute to m/min and HSR m/min produced by elite Australian footballers, affecting their match activity. However, while it appears that improved Yo-Yo IR2 performance prevents reductions in LSA m/min during a match, higher-speed activities (HSR m/min) and overall physical activity (m/min and load/min) are still reduced in the 4th quarter compared with the 1st quarter. © 2013 Human Kinetics, Inc.
- Description: 2003010859
- Authors: Mooney, Mitchell , Cormack, Stuart , O'Brien, Brendan , Coutts, Aaron
- Date: 2013
- Type: Text , Journal article
- Relation: International Journal of Sports Physiology and Performance Vol. 8, no. 2 (2013), p. 165-172
- Full Text:
- Reviewed:
- Description: Purpose: The purpose of this study was to determine if Yo-Yo Intermittent Recovery level 2 (Yo-Yo IR2) and the number of interchange rotations affected the match activity profile of elite Australian footballers. Method: Fifteen elite Australian footballers completed the Yo-Yo IR2 before the beginning of the season and played across 22 matches in which match activity profiles were measured via microtechnology devices containing a global positioning system (GPS) and accelerometer. An interchange rotation was counted when a player left the field and was replaced with another player. Yo-Yo IR2 results were further split into high and low groups. Results: Players match speed decreased from 1st to 4th quarter, while average-speed (m/min: P = .05) and low-speed activity (LSA, <15 km/h) per minute (LSA m/min; P = .06) significantly decreased in the 2nd half. Yo-Yo IR2 influenced the amount of m/min, high-speed running (HSR, >15 km/h) per minute (HSR m/min) and accelerometer load/min throughout the entire match. The number of interchanges significantly influenced the HSR m/min and m/min throughout the match except in the 2nd quarter. Furthermore, the low Yo-Yo IR2 group had significantly less LSA m/min in the 4th quarter than the high Yo-Yo IR2 group (92.2 vs 96.7 m/ min, P = .06). Conclusions: Both the Yo-Yo IR2 and number of interchanges contribute to m/min and HSR m/min produced by elite Australian footballers, affecting their match activity. However, while it appears that improved Yo-Yo IR2 performance prevents reductions in LSA m/min during a match, higher-speed activities (HSR m/min) and overall physical activity (m/min and load/min) are still reduced in the 4th quarter compared with the 1st quarter. © 2013 Human Kinetics, Inc.
- Description: 2003010859
Intention to use sport concussion guidelines among community-level coaches and sports trainers
- Newton, Joshua, White, Peta, Ewing, Michael, Makdissi, Michael, Davis, Gavin, Donaldson, Alex, Sullivan, John, Seward, Hugh, Finch, Caroline
- Authors: Newton, Joshua , White, Peta , Ewing, Michael , Makdissi, Michael , Davis, Gavin , Donaldson, Alex , Sullivan, John , Seward, Hugh , Finch, Caroline
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol.17, no.5 (2013), p.469-473
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: Objectives: Sporting bodies have developed guidelines for managing community-level players with suspected concussion in response to international consensus statements on concussion in sport. The purpose of this study was to examine the factors that influence the intended use of concussion guidelines among community-level coaches and sports trainers from two popular football codes in Australia: Australian football and rugby league. Design: Cross-sectional survey. Methods: The survey, based on an extended theory of planned behaviour model, was completed by 183 Australian football coaches, 121 Australian football sports trainers, 171 rugby league coaches, and 142 rugby league sports trainers. Results: Personal norms and self-efficacy were significant predictors of intention to use concussion guidelines, although the relationship between self-efficacy and intention was stronger among Australian football coaches than rugby league coaches. Analysis of the salient beliefs that underpin self-efficacy found that coaches, irrespective of football code, felt less familiar (2 = 25.70, p < 0.001) and less experienced (2 = 31.56, p < 0.001) than sports trainers in using the concussion guidelines. At the same time, Australian football personnel, irrespective oftheir team role, feltthatthey had insufficienttime (2 = 8.04, p < 0.01) and resources (2 = 12.31, p < 0.001) to implement the concussion guidelines relative to rugby league personnel. Conclusions: Programmes aimed at increasing the intended use of sport concussion guidelines should focus on enhancing self-efficacy and leveraging personal norms. Increasing coaches’ familiarity and experience in using the concussion guidelines would also be warranted, as would finding ways to overcome the perceived time and resource constraints identified among Australian football personnel.
- Authors: Newton, Joshua , White, Peta , Ewing, Michael , Makdissi, Michael , Davis, Gavin , Donaldson, Alex , Sullivan, John , Seward, Hugh , Finch, Caroline
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol.17, no.5 (2013), p.469-473
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text:
- Reviewed:
- Description: Objectives: Sporting bodies have developed guidelines for managing community-level players with suspected concussion in response to international consensus statements on concussion in sport. The purpose of this study was to examine the factors that influence the intended use of concussion guidelines among community-level coaches and sports trainers from two popular football codes in Australia: Australian football and rugby league. Design: Cross-sectional survey. Methods: The survey, based on an extended theory of planned behaviour model, was completed by 183 Australian football coaches, 121 Australian football sports trainers, 171 rugby league coaches, and 142 rugby league sports trainers. Results: Personal norms and self-efficacy were significant predictors of intention to use concussion guidelines, although the relationship between self-efficacy and intention was stronger among Australian football coaches than rugby league coaches. Analysis of the salient beliefs that underpin self-efficacy found that coaches, irrespective of football code, felt less familiar (2 = 25.70, p < 0.001) and less experienced (2 = 31.56, p < 0.001) than sports trainers in using the concussion guidelines. At the same time, Australian football personnel, irrespective oftheir team role, feltthatthey had insufficienttime (2 = 8.04, p < 0.01) and resources (2 = 12.31, p < 0.001) to implement the concussion guidelines relative to rugby league personnel. Conclusions: Programmes aimed at increasing the intended use of sport concussion guidelines should focus on enhancing self-efficacy and leveraging personal norms. Increasing coaches’ familiarity and experience in using the concussion guidelines would also be warranted, as would finding ways to overcome the perceived time and resource constraints identified among Australian football personnel.
Priorities for investment in injury prevention in community Australian football
- Finch, Caroline, Gabbe, Belinda, White, Peta, Lloyd, David, Twomey, Dara, Donaldson, Alex, Elliott, Bruce, Cook, Jill
- Authors: Finch, Caroline , Gabbe, Belinda , White, Peta , Lloyd, David , Twomey, Dara , Donaldson, Alex , Elliott, Bruce , Cook, Jill
- Date: 2013
- Type: Text , Journal article
- Relation: Clinical journal of sport medicine Vol. 23, no. 6 (November 2013 2013), p. 430-438
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Relation: http://purl.org/au-research/grants/nhmrc/565907
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- Reviewed:
- Description: Objective:High-quality sport-specific information about the nature, type, cause, and frequency of injuries is needed to set injury prevention priorities. This article describes the type, nature, and mechanism of injuries in community Australian Football (community AF) players, as collected through field-based monitoring of injury in teams of players.Data Sources:Compilation of published prospectively collected injury data from 3 studies in junior community AF (1202 injuries in 1950+ players) and 3 studies in adult community AF (1765 injuries in 2265 players). This was supplemented with previously unpublished data from the most recent adult community AF injury cohort study conducted in 2007 to 2008. Injuries were ranked according to most common body regions, nature of injury, and mechanism.Main Results:In all players, lower limb injuries were the most frequent injury in community AF and were generally muscle strains, joint sprains, and superficial injuries. These injuries most commonly resulted from incidental contact with other players, or from overexertion. Upper limb injuries were less common but included fractures, strains, and sprains that were generally caused by incidental contact between players and the result of players falling to the ground.Conclusions:Lower limb injuries are common in community AF and could have an adverse impact on sustained participation in the game. Based on what is known about their mechanisms, it is likely that a high proportion of lower limb injuries could be prevented and they should therefore be a priority for injury prevention in community AF.
- Authors: Finch, Caroline , Gabbe, Belinda , White, Peta , Lloyd, David , Twomey, Dara , Donaldson, Alex , Elliott, Bruce , Cook, Jill
- Date: 2013
- Type: Text , Journal article
- Relation: Clinical journal of sport medicine Vol. 23, no. 6 (November 2013 2013), p. 430-438
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Relation: http://purl.org/au-research/grants/nhmrc/565907
- Full Text:
- Reviewed:
- Description: Objective:High-quality sport-specific information about the nature, type, cause, and frequency of injuries is needed to set injury prevention priorities. This article describes the type, nature, and mechanism of injuries in community Australian Football (community AF) players, as collected through field-based monitoring of injury in teams of players.Data Sources:Compilation of published prospectively collected injury data from 3 studies in junior community AF (1202 injuries in 1950+ players) and 3 studies in adult community AF (1765 injuries in 2265 players). This was supplemented with previously unpublished data from the most recent adult community AF injury cohort study conducted in 2007 to 2008. Injuries were ranked according to most common body regions, nature of injury, and mechanism.Main Results:In all players, lower limb injuries were the most frequent injury in community AF and were generally muscle strains, joint sprains, and superficial injuries. These injuries most commonly resulted from incidental contact with other players, or from overexertion. Upper limb injuries were less common but included fractures, strains, and sprains that were generally caused by incidental contact between players and the result of players falling to the ground.Conclusions:Lower limb injuries are common in community AF and could have an adverse impact on sustained participation in the game. Based on what is known about their mechanisms, it is likely that a high proportion of lower limb injuries could be prevented and they should therefore be a priority for injury prevention in community AF.