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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- 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.
- 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.
- Ekegren, Christina, Gabbe, Belinda, Donaldson, Alex, Cook, Jill, Lloyd, David, Finch, Caroline
- Authors: Ekegren, Christina , Gabbe, Belinda , Donaldson, Alex , Cook, Jill , Lloyd, David , Finch, Caroline
- Date: 2014
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 18, no. 6 (2014), p.651-655
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Relation: http://purl.org/au-research/grants/nhmrc/1058737
- Relation: http://purl.org/au-research/grants/nhmrc/565907
- Full Text: false
- Reviewed:
- Description: Objectives: Far fewer injury surveillance systems exist within community sport than elite sport. As a result, most epidemiological data on sports injuries have limited relevance to community-level sporting populations. There is potential for data from community club-based injury surveillance systems to provide a better understanding of community sports injuries. This study aimed to describe the incidence and profile of community-level Australian football injuries reported using a club-based injury surveillance system. Design: Prospective, epidemiological study. Methods: Sports trainers from five community-level Australian football leagues recorded injury data during two football seasons using the club-based system. An online surveillance tool developed by Sports Medicine Australia ('Sports Injury Tracker') was used for data collection. The injury incidence, profile and match injury rate were reported. Results: Injury data for 1205 players were recorded in season one and for 823 players in season two. There was significant variability in injury incidence across clubs. However, aggregated data were consistent across football seasons, with an average of 0.7 injuries per player per season and 38-39 match injuries per 1000. h match exposure. A large proportion of injuries occurred during matches, involved the lower limb and resulted from contact. Conclusions: Data from the club-based system provided a profile of injuries consistent with previous studies in community-level Australian football. Moreover, injury incidence was consistent with other studies using similar personnel to record data. However, injury incidence was lower than that reported in studies using player self-report or healthcare professionals and may be an underestimate of true values.
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.
- Twomey, Dara, Finch, Caroline, Doyle, Tim, Lloyd, David, Elliot, Bruce
- Authors: Twomey, Dara , Finch, Caroline , Doyle, Tim , Lloyd, David , Elliot, Bruce
- Date: 2013
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 16, no. Supplement 1 (2013), p. e24
- Full Text: false
- Reviewed:
- Description: Introduction: A full understanding of the ecological context is critical in the implementation of an effective sports injury prevention intervention. There are many complexities and challenges associated with the delivery of a successful intervention in a community team-based setting. Although the development and efficacy of interventions are regularly reported, rarely are the lessons learnt during the delivery of the intervention published. Therefore, the purpose of this paper is to describe the key issues experienced in the delivery of a lower limb injury prevention training program in community-level Australian football.
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