Thirty-seven jump-landing biomechanical variables are associated with asymptomatic patellar tendon abnormality and patellar tendinopathy : A systematic review
- Authors: Harris, Meaghan , Schultz, Adrian , Drew, Michael , Rio, Ebonie , Adams, Stuart , Edwards, Suzi
- Date: 2020
- Type: Text , Journal article , Review
- Relation: Physical Therapy in Sport Vol. 45, no. (2020), p. 38-55
- Full Text: false
- Reviewed:
- Description: Objective: To identify studies that report three-dimensional (3D) biomechanical analysis of jump-landing tasks in relation to athletes with current patellar tendinopathy (PT), and/or asymptomatic with history of PT or patellar tendon abnormality (PTA) on diagnostic imaging. Methods: Five electronic databases were searched. Included articles were required to: (1) investigate the 3D biomechanics of a jump-landing task; (2) be cross-sectional or longitudinal in design; and (3) include participants that had symptomatic PT, were asymptomatic with a history of PT, asymptomatic with PTA on diagnostic imaging and/or asymptomatic with an unknown pathology or PT history. Results: Thirty-seven statistically significant jump-landing variables were associated with PT, history of PT and/or PTA. The only consistent variable that could be replicated between studies was knee flexion angle at initial foot-ground contact (IC) and an altered hip flexion/extension strategy during a horizontal land phase of a vertical stop-jump. Conclusion: Isolated vertical landings or take-offs alone may not be sensitive enough to identify key jump-landing variables associated with PT, thus clinicians and researchers should incorporate a whole jump-landing task with a horizontal landing component. Sagital plane hip and knee kinematics in a horizontal landing phase appear to provide the most valuable information for evaluating those with PT. (C) 2020 Elsevier Ltd. All rights reserved.
An integrated physiological and performance profile of professional tennis
- Authors: Hornery, Daniel , Farrow, Damian , Mujika, Inigo , Young, Warren
- Date: 2007
- Type: Text , Journal article
- Relation: British Journal of Sports Medicine Vol. 41, no. 8 (2007), p. 531-536
- Full Text: false
- Reviewed:
- Description: Objective: To describe the physiological responses to tournament tennis in relation to prevailing environmental conditions, match notation, and skills that underpin performance. Design: 14 male professional tennis players (mean (SD) age, 21.4 (2.6) years; height, 183.0 (6.9) cm; body mass, 79.2 (6.4) kg) were studied while contesting international tennis tournaments. Environmental conditions, match notation, physiological (core temperature, hydration status, heart rate, blood variables), and performance indices (serve kinematics, serve velocity, error rates) were recorded. Results: Hard and clay court tournaments elicited similar peak core temperature (38.9 (0.3) v 38.5 (0.6)°C) and average heart rate (152 (15) v 146 (19) beats/min) but different body mass deficit (1.05 (0.49) v 0.32 (0.56)%, p<0.05). Average pre-match urine specific gravity was 1.022 (0.004). Time between points was longer during hard court matches (25.1 (4.3) v 17.2 (3.3) s, p<0.05). Qualitative analysis of first and second serves revealed inverse relations between the position of the tossing arm at ball release and the position of the ball toss and progressive match time (respectively, r= -0.74 and r= -0.73, p<0.05) and incurred body mass deficit (r=0.73 and r=0.73, p<0.05). Conclusions: Participants began matches in a poor state of hydration, and experienced moderate thermoregulatory strain and dehydration during competition. These adverse physiological conditions may compromise performance and influence notational analyses.
- Description: C1
- Description: 2003005645
Validity and relevance of the pack hike wildland firefighter work capacity test : A review
- Authors: Petersen, Aaron , Payne, Warren , Phillips, Matthew , Netto, Kevin , Nichols, David , Aisbett, Brad
- Date: 2010
- Type: Text , Journal article
- Relation: Ergonomics Vol. 53, no. 10 (2010), p. 1276-1285
- Full Text: false
- Reviewed:
- Description: Fighting wildland fire is a physically demanding occupation. Wildland firefighters need to be physically fit to work safely and productively. To determine whether personnel are fit for duty, many firefighting agencies employ physical competency tests, such as the pack hike test (PHT). The PHT involves a 4.83-km hike over level terrain carrying a 20.4-kg pack within a 45-min period. The PHT was devised to test the job readiness of US wildland firefighters but is also currently used by some fire agencies in Australia and Canada. This review discusses the history and development of the PHT with emphasis on the process of test validation. Research-based training advice for the PHT is given, as well as discussion of the risks associated with completing the PHT. Different versions and modifications to the PHT have emerged in recent years and these are discussed with regard to their validity. Finally, this review addresses the relevance and validity of the PHT for Australian and Canadian wildland firefighters. Statement of Relevance: This paper reviews the history, development and validity of the PHT, an internationally recognised and utilised wildland firefighter work capacity test. It is concluded that while the PHT has general content validity for US wildland firefighters, verification of its reliability, criterion and construct validity is still needed.
Determining the intra- and inter-observer reliability of screening tools used in sports injury research
- Authors: Hayen, Andrew , Dennis, Rebecca , Finch, Caroline
- Date: 2007
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 10, no. 4 (2007), p. 201-210
- Full Text:
- Reviewed:
- Description: Sports injury etiological studies explore the relationships between potential injury risk factors and injury outcomes. The ability of such studies to clearly identify intrinsic risk factors for sports injury depends on the accuracy of their measurement. Measurements need to be reproducible over time and repeatable by different observers, as well as within a given individual. The importance of the reliability of pre-participation screening protocols and other clinical assessment tools has been identified in a number of published studies. However, a review of these studies indicates that a variety of statistical techniques have been used to calculate intra- and inter-observer reliability. While the intra-class correlation coefficient (ICC) is the most often cited measure, a range of statistical approaches to estimating ICCs have been used. It is therefore difficult to determine which statistical method is most appropriate in the context of measuring intrinsic risk factors in sports injury research. This paper summarises a statistical method for the concurrent assessment of intra- and inter-observer reliability and presents an argument for why this approach should be adopted by sports injury researchers using screening protocols that collect continuous data.
- Description: C1
- Description: 2003005882
Effects of running, static stretching and practice jumps on explosive force production and jumping performance
- Authors: Young, Warren , Behm, David
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Sports Medicine and Physical Fitness Vol. 43, no. 1 (2003), p. 21-27
- Full Text: false
- Reviewed:
- Description: Aim. The interaction between running, stretching and practice jumps during warm-up for jumping tests has not been investigated. The purpose of the present study was to compare the effects of running, static stretching of the leg extensors and practice jumps on explosive force production and jumping performance. Methods. Sixteen volunteers (13 male and 3 female) participated in five different warm-ups in a randomised order prior to the performance of two jumping tests. The warm-ups were control, 4 min run, static stretch, run + stretch, and run + stretch + practice jumps. After a 2 min rest, a concentric jump and a drop jump were performed, which yielded 6 variables expressing fast force production and jumping performance of the leg extensor muscles (concentric jump height, peak force, rate of force developed, drop jump height, contact time and height/time). Results. Generally the stretching warm-up produced the lowest values and the run or run + stretch + jumps warm-ups produced the highest values of explosive force production. There were no significant differences (p<0.05) between the control and run + stretch warm-ups, whereas the run yielded significantly better scores than the run + stretch warm-up for drop jump height (3.2%), concentric jump height (3.4%) and peak concentric force (2.7%) and rate of force developed (15.4%). Conclusion. The results indicated that submaximum running and practice jumps had a positive effect whereas static stretching had a negative influence on explosive force and jumping performance. It was suggested that an alternative for static stretching should be considered in warm-ups prior to power activities.
- Description: C1
- Description: 2003000536
An evaluation of a new test of reactive agility and its relationship to sprint speed and change of direction speed
- Authors: Sheppard, Jeremy , Young, Warren , Doyle, Tim , Sheppard, T. A. , Newton, Robert
- Date: 2006
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 9, no. 4 (2006), p. 342-349
- Full Text:
- Reviewed:
- Description: The purpose of this study was to evaluate the reliability and validity of a new test of agility, the reactive agility test (RAT), which included anticipation and decision-making components in response to the movements of a tester. Thirty-eight Australian football players took part in the study, categorized into either a higher performance group (HPG) (n = 24) or lower performance group (LPG) (n = 14) based on playing level from the previous season. All participants undertook testing of a 10 m straight sprint (10 mSS), a 8-9 m change of direction speed test (CODST), and the RAT. Test-retest and inter-tester reliability testing measures were conducted with the LPG. The intra-class correlation (ICC) of the RAT was 0.870, with no significant (p < 0.05) difference between the test results obtained on the first and second test sessions using a t-test. A dependent samples t-test revealed no significant (p < 0.05) difference between the test results of two different testers with the same population. The HPG were significantly (p = 0.001) superior to those of the LPG on the RAT, with no differences observed on any other variable. The RAT is an acceptably reliable test when considering both test-retest reliability, as well as inter-rater reliability. In addition, the test was valid in distinguishing between players of differing performance level in Australian football, while the 10 mSS and CODST were not. This result suggests that traditional closed skill sprint and sprint with direction change tests may not adequately distinguish between players of different levels of competition in Australian football. © 2006 Sports Medicine Australia.
- Description: C1
- Description: 2003002132
Physical performance and electromyographic responses to an acute bout of paired set strength training versus traditional strength training
- Authors: Robbins, Daniel , Young, Warren , Behm, David , Payne, Warren , Klimstra, Marc
- Date: 2010
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 25, no. 5 (2010), p. 1237-1245
- Full Text: false
- Reviewed:
- Description: Physical performance and electromyographic responses to an acute bout of paired set strength training versus traditional strength training. J Strength Cond Res 24(5): 1237-1245, 2010-The objective of this study was to investigate the acute effects of performing paired set (PS) vs. traditional set (TS) training over 3 consecutive sets on volume load (VL) and electromyographic (EMG) activity of the pectoralis major, anterior deltoid, latissimus dorsi, and trapezius muscles. Following a familiarization session 16 trained males performed 2 testing protocols using 4 repetition maximum loads: TS (3 sets of bench pull [Bpull] followed by 3 sets of bench press [Bpress] performed in approximately 20 minutes) or PS (3 sets of Bpull and 3 sets of Bpress performed in an alternating manner in approximately 10 minutes). Bpull and Bpress VL decreased significantly from set 1 to set 2 and from set 2 to set 3 under both conditions. There was no difference between VL per set, or over the sessions, between the 2 conditions. PS was determined to be more efficient (VL/time) as compared to TS. EMG activity of the 4 monitored muscles was not different for the 2 conditions or within each condition over the 3 sets. However, there was a significant within-set response in EMG activity in the Bpress exercise. The data suggest that a 4-minute rest interval between sets may not be adequate to maintain VL using either protocol. The data further suggest that PS training may be as effective as TS training in terms of VL maintenance and more effective in terms of efficiency. The comparison of EMG activity between the PS and TS protocols suggests that the level of neuromuscular fatigue does not differ under the 2 conditions. PS training would appear to be an effective method of exercise with respect to VL maintenance and efficiency.
The effect of a resistance training programme on the grab, track and swing starts in swimming
- Authors: Breed, Ray , Young, Warren
- Date: 2003
- Type: Text , Journal article
- Relation: Journal of Sports Sciences Vol. 21, no. 3 (2003), p. 213-220
- Full Text: false
- Reviewed:
- Description: The aim of this study was to establish the effectiveness of a resistance training programme, designed to improve vertical jumping ability, on the grab, swing and rear-weighted track starts in swimming. Twenty-three female non-competitive swimmers participated (age 19.9±2.4 years; mean±s). The diving techniques were practised weekly for 8 weeks. The participants were randomly assigned to a control group (n = 11) or a resistance-training group (n = 12), which trained three times a week for 9 weeks. The tests before and after the training programme involved performing each dive technique and six dry-land tests: two countermovement jumps (with and without arms), two isokinetic squats (bar speeds of 0.44 and 0.70 rad.s-1) and two overhead throws (with and without back extension). A repeated-measures multivariate analysis of variance was used to show that resistance training improved performance in the dry-land tests (P < 0.0001). No significant improvements due to training were found for any temporal, kinematic or kinetic variables within the grab or swing starts. Significant improvements (P < 0.05) were found for the track start for take-off velocity, take-off angle and horizontal impulse. The results suggest that the improved skill of vertical jumping was not transferred directly to the start, particularly in the grab technique. Non-significant trends towards improvement were observed within all starts for vertical force components, suggesting the need to practise the dives to retrain the changed neuromuscular properties.
- Description: C1
- Description: 2003000554
Head, face and neck injury in youth rugby: Incidence and risk factors
- Authors: McIntosh, Andrew , McCrory, Paul , Finch, Caroline , Wolfe, Rory
- Date: 2010
- Type: Text , Journal article
- Relation: British Journal of Sports Medicine Vol. 44, no. 3 (2010), p. 188-193
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text: false
- Reviewed:
- Description: OBJECTIVES: In this study, the incidence of head, neck and facial injuries in youth rugby was determined, and the associated risk factors were assessed. DESIGN: Data were extracted from a cluster randomised controlled trial of headgear with the football teams as the unit of randomisation. No effect was observed for headgear use on injury rates, and the data were pooled. SETTING: General school and club-based community competitive youth rugby in the 2002 and 2003 seasons. PARTICIPANTS: Young male rugby union football players participating in under-13, under 15, under 18 and under 21 years competitions. Eighty-two teams participated in year 1 and 87 in year 2. MAIN OUTCOME MEASURES: Injury rates for all body regions combined, head, neck and face calculated for game and missed game injuries. RESULTS: 554 head, face and neck injuries were recorded within a total of 28 902 h of rugby game exposure. Level of play and player position were related to injury risk. Younger players had the lowest rates of injury; forwards, especially the front row had the highest rate of neck injury; and inside backs had the highest rate of injuries causing the player to miss a game. Contact events, including the scrum and tackle, were the main events leading to injury. CONCLUSION: Injury prevention must focus on the tackle and scrum elements of a youth rugby game.
The effect of an upper-body agonist-antagonist resistance training protocol on volume load and efficiency
- Authors: Robbins, Daniel , Young, Warren , Behm, David
- Date: 2010
- Type: Text , Journal article
- Relation: Journal of Strength and Conditioning Research Vol. 24, no. 10 (2010), p. 2632-2640
- Full Text: false
- Reviewed:
- Description: The objective of this study was to investigate the acute effects on volume load (VL) (load x repetitions) of performing paired set (PS) vs. traditional set (TS) training over 3 consecutive sets. After a familiarization session 16 trained men performed 2 testing protocols using 4 repetition maximum loads: TS (3 sets of bench pull followed by 3 sets of bench press performed in approximately 10 minutes) or PS (3 sets of bench pull and 3 sets of bench press performed in an alternating manner in approximately 10 minutes). Bench pull and bench press VL decreased significantly from set 1 to set 2 and from set 2 to set 3 under both the PS and TS conditions (p < 0.05). Bench pull and bench press VL per set were significantly less under TS as compared to PS over all sets, with the exception of the first set (bench pull set 1) (p < 0.05). Session totals for bench pull and bench press VL were significantly less under TS as compared to PS (p < 0.05). Paired set was determined to be more efficient (VL/time) as compared to TS. The data suggest that a 2-minute rest interval between sets (TS), or a 4-minute rest interval between similar sets (PS), may not be adequate to maintain VL. The data further suggest that PS training may be more effective than TS training in terms of VL maintenance and more efficient. Paired set training would appear to be an efficient method of exercise. Practitioners wishing to maximize work completed per unit of time may be well advised to consider PS training.
A prospective study of injuries in basketball : A total profile and comparison by gender and standard of competition
- Authors: McKay, Gaylene , Goldie, P. A. , Payne, Warren , Oakes, B. W. , Watson, L. F.
- Date: 2001
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 4, no. 2 (2001), p. 196-211
- Full Text: false
- Reviewed:
- Description: The study aimed to determine prospectively a basketball injury profile, including severity of injury, and to compare the injury profile by gender and standard of competition. Trained observers viewed basketball games, noting the occurrence of injuries, and confirmed injuries by questioning all players on site after the game. Injured players completed a questionnaire and the progress of their injury was monitored by telephone interview. A total of 10,393 basketball participations were observed. An overall injury rate was documented of 18.3 per 1,000 participations (24.7 per 1,000 playing hours), and was comparable by gender and standard of competition. Serious injuries (missing one or more weeks of play) occurred at a rate of 2.89/1,000 participations; with the ankle joint the most common serious injury (1.25/1,000 participations), followed by the calf/anterior leg (0.48/1,000 participations) and knee joint (0.29/1,000 participations). The severity of the injury was significantly associated with the body region injured, with more serious injuries incurred to the lower limb than other body regions (p <.05). The severity of the injury incurred was not related to the standard of competition, gender, age, height, number of games played per week, amount of training undertaken, type of injury, or the mechanism of injury (p> .05).
- Description: 2003002666
The effectiveness of a squash eyewear promotion strategy
- Authors: Eime, Rochelle , Finch, Caroline , Wolfe, R. , Owen, Neville , McCarty, Catherine
- Date: 2005
- Type: Text , Journal article
- Relation: Britsh Journal of Sports Medicine Vol. 39, no. (2005), p. 681-684
- Full Text:
- Reviewed:
- Description: Objective: To evaluate the protective eyewear promotion (PEP) project, which was a comprehensive educational strategy to increase the use of appropriate protective eyewear by squash players. Methods: An ecological study design was used. Four squash venues in one playing association were randomly chosen to receive PEP and four in another association maintained usual practice and hence formed a control group. The primary evaluation measurements were surveys of cross sectional samples of players carried out before and after the intervention. The surveys investigated players’ knowledge, behaviours, and attitudes associated with the use of protective eyewear. The survey carried out after the intervention also determined players’ exposure to PEP. Univariate and multivariate analyses were undertaken to describe differences at PEP venues from pre- to post-intervention and to compare these with the control venues. Results: The PEP players had 2.4 times the odds (95% confidence interval, 1.3 to 4.2) of wearing appropriate eyewear compared with control group players post-intervention, relative to the groups’ preintervention baselines. Components of PEP, such as stickers and posters and the availability and prominent positioning of the project eyewear, were found to contribute to players adopting favourable eyewear behaviours. Conclusions: Components of the PEP intervention were shown to be effective. The true success will be the sustainability and dissemination of the project, favourable eyewear behaviours, and evidence of the prevention of eye injuries long into the future.
- Description: C1
- Description: 2003005015
Relationship between pre-season anthropometric and fitness measures and indicators of playing performance in elite junior Australian rules football
- Authors: Young, Warren , Pryor, Luke
- Date: 2007
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 10, no. 2 (2007), p. 110-118
- Full Text:
- Reviewed:
- Description: The purpose of this research was to determine the relationships between selected anthropometric and fitness measures with indicators of performance in elite junior Australian football players. During the pre-season, 485 players from the elite Victorian under-18 Australian Rules football competition were tested for height, body mass, hand span, arm length, standing reach, vertical jump, 5 and 20 m sprint times, agility, predicted over(V, ) O2 max and sit and reach flexibility. Performance indicators included being selected for the first game of the season and the number of possessions, marks, hitouts, and the number of games where votes were awarded in the first eight games of the season. The top and bottom four teams on the ladder were also compared after eight games. Players were divided into groups on the basis of the above indicators and the groups were compared statistically by analysis of variance (ANOVA). There were several significant differences between selected and non-selected players. Players acquiring the most possessions were significantly (p < 0.05) shorter (effect size: ES = 0.78), with less body mass (ES = 0.55) and possessed greater acceleration (ES = 0.44-0.56) and endurance (ES = 0.51). Body mass was significantly related to the number of marks and height was related to hitouts (p < 0.05). Acceleration was the only fitness quality to discriminate between higher and lower vote winners. The players from the top four teams had a significantly greater standing reach (p = 0.038, ES = 0.53), were heavier (p = 0.032, ES = 0.55) but not superior in any fitness measure. Generally hand span, agility and flexibility were not related to performance indicators. It was concluded that shorter and lighter players who possess high levels of speed and endurance are more likely to acquire possessions and be awarded votes, however these attributes do not guarantee team success. The small relationships between agility and flexibility to performance might be explained by the choice of tests used to assess these qualities. © 2006 Sports Medicine Australia.
- Description: C1
- Description: 2003005642
A sports setting matrix for understanding the implementation context for community sport
- Authors: Finch, Caroline , Donaldson, Alex
- Date: 2010
- Type: Text , Journal article
- Relation: British Journal of Sports Medicine Vol. 44, no. 13 (2010), p. 973-978
- Full Text: false
- Reviewed:
- Description: There has been increasing recognition of the need for effectiveness research within the real-world intervention context of community sport. This is important because, even if interventions have been shown to be efficacious in controlled trials, if they are not also widely adopted and sustained, then it is unlikely that they will have a public health impact. There is very little information about how to best conduct such studies, but application of health promotion frameworks, such as the RE-AIM framework, to evaluate the public health impact of interventions could potentially help to understand the implementation context. Care needs to be taken when directly applying the RE-AIM framework, however, because the definitions for each of its dimensions will depend on the level/s the intervention is targeted at. This paper provides a novel extension to the RE-AIM framework (the RE-AIM SportsSetting Matrix (RE-AIM SSM)), which accounts for the fact that many sports injury interventions need to be targeted at multiple levels of sports delivery. Accordingly, the RE-AIM components also need to be measured across all tiers of possible influence on the rate of uptake and effectiveness. Specific examples are given for coach delivered exercise training interventions. The RE-AIM SSM is specific to the community sports setting implementation context and could be used to guide the delivery of future sports safety, and other health promotion, interventions in this area.
A review of agility : Practical applications for strength and conditioning
- Authors: Young, Warren , Farrow, Damian
- Date: 2006
- Type: Text , Journal article
- Relation: Strength and Conditioning Journal Vol. 28, no. 5 (2006), p. 24-29
- Full Text:
- Reviewed:
- Description: Agility is an important component of many sports but has not been extensively researched. The various components that contribute to agility performance are discussed and training guidelines are provided. There appears to be limited transfer to agility performance from straight sprint training as well as from general strength training. The principle of training specificity is emphasized to achieve maximum transfer to on-field performance.
- Description: C1
- Description: 2003002120
Unprotected eyes in squash : Not seeing the risk of injury
- Authors: Eime, Rochelle , McCarty, Catherine , Finch, Caroline , Owen, Neville
- Date: 2005
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 8, no. 1 (2005), p. 92-100
- Full Text: false
- Reviewed:
- Description: The use of appropriate eyewear in squash can protect the eyes against injury. However, few adult squash players adequately protect their eyes against potential severe injuries. We describe the characteristics of non-users of protective eyewear and examine predictors of appropriate eyewear use. Self-report surveys of adult players were conducted in metropolitan Melbourne, Australia. Information on players' knowledge, behaviours and attitudes associated with protective eyewear use was collected, in addition to player demographic data. Appropriate eyewear was defined as Standards-approved polycarbonate lens eyewear. The majority 92.2% of players did not adequately protect their eyes while playing squash. Significant predictors of reported eyewear use were: previous eye injury; playing squash on average more than 2 hr per wk; having played for more than 20 y; and having more favourable attitudes towards eye safety in squash. The significant predictors of appropriate eyewear use were: being female; previous eye injury; playing squash on average more than 2 hr per week; and having more favourable attitudes towards eye safety in squash. Understanding the characteristics of both users and non-users of appropriate eye protection in squash is essential for informing future prevention strategies.
- Description: C1
- Description: 2003001112
Fielders and batters are injured too : A prospective cohort study of injuries in junior club cricket
- Authors: Finch, Caroline , White, Peta , Dennis, Rebecca , Twomey, Dara , Hayen, Andrew
- Date: 2010
- Type: Text , Journal article
- Relation: Journal of Science and Medicine in Sport Vol. 13, no. 5 (2010), p. 489-495
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text: false
- Reviewed:
- Description: Internationally, there is a lack of good quality, prospectively collected injury data reported for junior club cricketers. This study describes injury rates according to age level of play and playing positions in junior community-level club cricketers to identify priorities for prevention. A prospective cohort study was used to monitor injuries in 88 under 12 years (U12), 203 U14 and 120 U16 players from the Ballarat Junior Cricket Association, Australia over the 2007/2008 playing season. Injury rates were calculated per 1000 participations when batting, bowling or fielding in matches and training sessions. Injury rate ratios were used to compare rates across age levels of play and position of play. Overall, 47 injuries were reported. Injury rates increased with age level of play with only one U12 player injured. Match injury rates were 3.57 per 1000 U14 participations versus 4.80 per 1000 U16 participations. Training injury rates were 4.20 per 1000 U14 participations versus 5.11 per 1000 U16 participations. On a proportionate basis, injuries occurred equally to fielders, batters and bowlers. There was a trend towards more injuries occurring while batting and fielding in matches, and more injuries occurring while bowling and batting during training sessions. In conclusion, injury rates in junior cricket players are low, but increase with age level of play. Unlike adult forms of the game, injuries occur to fielders and batters at least as frequently as to bowlers, indicating that preventive strategies need to be developed for all junior players and not just bowlers, as has been the focus previously. © 2009 Sports Medicine Australia.
- Description: 2003008120
Internal and external imagery perspective measurement and use in imagining open and closed sports skills : An exploratory study
- Authors: Spittle, Michael , Morris, Tony
- Date: 2007
- Type: Text , Journal article
- Relation: Perceptual and Motor Skills Vol. 104, no. 2 (2007), p. 387-404
- Full Text:
- Reviewed:
- Description: This study explored the measurement and use of internal and external imagery perspectives during imagery of open and closed sports skills. Participants (N = 41; male = 23; female = 18), ages 14 to 28 (M = 19.4 yr.; SD = 3.1), who were recruited from undergraduate classes in human movement and physical education, and local sporting teams, completed the Imagery Use Questionnaire and then imagined performing eight common sports skills, four open skills and four closed skills, in a random order. Participants provided concurrent verbalisation during their imagery. Immediately after imagining each skill, participants completed a rating scale and retrospective verbalisation of imagery perspective use. Analysis indicated that the questionnaire gave a general imagery perspective preference but was not a strong predictor of imagery used on specific occasions. The three measures of imagery perspective were equivalent in imagining performing particular skills. Participants experienced more internal imagery than external imagery while imagining the eight sports skills, but there was no significant difference between perspective use on the open and closed skills. © Perceptual and Motor Skills 2007.
- Description: C1
- Description: 2003005636
Technical note : The use of subject derived scale factors for one-camera 2D analysis in underwater swimming
- Authors: Clothier, Peter , Payne, Warren , Harvey, Jack , Blanksby, Brian , Benjanuvatra, N.
- Date: 2004
- Type: Text , Journal article
- Relation: Journal of Human Movement Studies Vol. 46, no. 4 (2004), p. 333-345
- Full Text: false
- Reviewed:
- Description: This technical note describes a comparison of relative errors in one-camera 2D underwater motion analysis when using two different control structure methods for calibrating video images. Eleven male and six female participants performed underwater kicking swim trials. A reference structure of known length and each swimmer's actual (land measured) thigh length were each used to calibrate the movement space from which digitised thigh lengths were calculated from each trial. For each trial, mean thigh lengths calculated using the two methods were then compared to actual thigh length for each swimmer and the differences recorded. Mean differences between actual and computed thigh lengths for the two methods were shown to be similar. However, the spread of mean differences was much less when the actual thigh length was used for calibration. This result strongly supports the use of thigh length as a more accurate method of calibration for one-camera 2D underwater motion analysis.
- Description: C1
- Description: 2003000878
The extent to which behavioural and social sciences theories and models are used in sport injury prevention research
- Authors: McGlashan, Angela , Finch, Caroline
- Date: 2010
- Type: Text , Journal article
- Relation: Sports Medicine Vol. 40, no. 10 (2010), p. 841-858
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text: false
- Reviewed:
- Description: Behavioural and social science theories and models (BSSTM) can enhance efforts to increase health and safety behaviours, such as the uptake and maintenance of injury prevention measures. However, the extent to which they have been used in sports injury research to date is currently unknown. A systematic review of 24 electronic databases was undertaken to identify the extent to which BSSTM have been incorporated into published sports injury prevention research studies and to identify which theories were adopted and how they were used. After assessment against specific inclusion and exclusion criteria, the full text of 100 potentially relevant papers was reviewed in detail. These papers were classified as follows: (i) explicit the use of BSSTM was a stated key aspect in the design or conduct of the study; or (ii) atheoretical there was no clear evidence for the use of BSSTM. The studies that explicitly mentioned BSSTM were assessed for how BSSTM were specifically used. Amongst the 100 identified papers, only eleven (11 of the total) explicitly mentioned BSSTM. Of these, BSSTM were most commonly used to guide programme designimplementation (n8) andor to measure a theoryconstruct (n7). In conclusion, very few studies relating to sport safety behaviours have explicitly used any BSSTM. It is likely that future sports injury prevention efforts will only be enhanced, and achieve successful outcomes, if increased attention is given to fully understanding the behavioural determinants of safety actions. Appropriate use of BSSTM is critical to provide the theoretical basis to guide these efforts. © 2010 Adis Data Information BV. All rights reserved.