The attentional focus strategy (AFS) affects drop jump (DJ) performance; however, its effects on DJ kinetics and kinematics are unclear. This study examines the effects of AFS on DJ performance, kinetics and kinematics. Forty collegiate males were divided into a DJ experienced group and a DJ inexperienced group, and they performed two trials of DJs after listening to instructions designed to elicit internal (INT), external (EXT) or neutral (NEUT) focus of attention. In the experienced group, the reactive strength index (RSI) was larger with the NEUT than with the INT. Hip joint torque and positive hip joint power in the concentric phase was smaller with the NEUT than with the INT, and the hip joint angle at the lowest centre of mass was larger with the NEUT than with the INT ( p < .05). In the inexperienced group, RSI was larger with the EXT than with the INT. Further, the hip joint torque in the concentric phase was smaller with the EXT than with the INT; positive ankle joint power was larger with the EXT than with the INT; and the hip joint angles at the lowest centre of mass and take-off were larger with the EXT than with the INT ( p < .05). These results showed that the AFS affected the DJ performance, kinetics and kinematics and suggested that effective DJ training may be achieved with the NEUT for DJ experienced and with the EXT for DJ inexperienced.
注意力集中策略（AFS）会影响落点跳跃（DJ）的成绩，但其对DJ动力学和运动学的影响尚不清楚。本研究探讨了注意力集中策略对 DJ 成绩、动力学和运动学的影响。40 名大学生被分为 DJ 经验丰富组和 DJ 经验不足组，他们在听完旨在诱发内部（INT）、外部（EXT）或中性（NEUT）注意力集中的指令后进行了两次 DJ 试验。在经验丰富组中，NEUT 的反应强度指数（RSI）大于 INT。在同心阶段，NEUT 的髋关节扭矩和髋关节正力量小于 INT，而在最低质心处，NEUT 的髋关节角度大于 INT ( p < .05)。在无经验组中，EXT 的 RSI 比 INT 大。此外，EXT 在同心阶段的髋关节扭矩小于 INT；EXT 的踝关节正动力大于 INT；EXT 在最低质量中心和起飞时的髋关节角度大于 INT ( p < .05)。这些结果表明，AFS 会影响 DJ 性能、运动学和运动学，并建议 DJ 经验丰富者使用 NEUT，DJ 经验不足者使用 EXT 进行有效的 DJ 训练。
{"title":"Effects of attentional focus strategy on drop jump for athletes with different experience levels: Performance, kinetics and kinematics","authors":"Yuki Furuhashi, Takuya Yoshida, Kazuki Ota, Kotaro Muratomi, Ryohei Hayashi, Satoru Tanigawa, Hirohiko Maemura","doi":"10.1177/17479541241236072","DOIUrl":"https://doi.org/10.1177/17479541241236072","url":null,"abstract":"The attentional focus strategy (AFS) affects drop jump (DJ) performance; however, its effects on DJ kinetics and kinematics are unclear. This study examines the effects of AFS on DJ performance, kinetics and kinematics. Forty collegiate males were divided into a DJ experienced group and a DJ inexperienced group, and they performed two trials of DJs after listening to instructions designed to elicit internal (INT), external (EXT) or neutral (NEUT) focus of attention. In the experienced group, the reactive strength index (RSI) was larger with the NEUT than with the INT. Hip joint torque and positive hip joint power in the concentric phase was smaller with the NEUT than with the INT, and the hip joint angle at the lowest centre of mass was larger with the NEUT than with the INT ( p < .05). In the inexperienced group, RSI was larger with the EXT than with the INT. Further, the hip joint torque in the concentric phase was smaller with the EXT than with the INT; positive ankle joint power was larger with the EXT than with the INT; and the hip joint angles at the lowest centre of mass and take-off were larger with the EXT than with the INT ( p < .05). These results showed that the AFS affected the DJ performance, kinetics and kinematics and suggested that effective DJ training may be achieved with the NEUT for DJ experienced and with the EXT for DJ inexperienced.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"32 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140035470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-04DOI: 10.1177/17479541241232504
Tianyu Guan, Tim B Swartz
This paper considers how player acceleration changes in soccer relative to age. A plot of average maximum acceleration versus age is produced. The construction of the plot is based on methods from functional data analysis and the availability of tracking data from the 2019 season of the Chinese Super League. For an individual player, we calculate his maximum acceleration for each single match of the 2019 season. Since the players’ maximum accelerations are observed only on a single season instead of their entire careers, we treat them as incomplete functional data, called functional snippets. The average maximum acceleration, i.e., the mean function of the functional snippets rather than full curves is estimated by a local linear smoothing method. The most important observation is that the shape of the acceleration curve closely resembles curves of soccer performance versus age. This observation has implications for predicting future performance since acceleration is more easily and more accurately measured than performance.
{"title":"Acceleration and age in soccer","authors":"Tianyu Guan, Tim B Swartz","doi":"10.1177/17479541241232504","DOIUrl":"https://doi.org/10.1177/17479541241232504","url":null,"abstract":"This paper considers how player acceleration changes in soccer relative to age. A plot of average maximum acceleration versus age is produced. The construction of the plot is based on methods from functional data analysis and the availability of tracking data from the 2019 season of the Chinese Super League. For an individual player, we calculate his maximum acceleration for each single match of the 2019 season. Since the players’ maximum accelerations are observed only on a single season instead of their entire careers, we treat them as incomplete functional data, called functional snippets. The average maximum acceleration, i.e., the mean function of the functional snippets rather than full curves is estimated by a local linear smoothing method. The most important observation is that the shape of the acceleration curve closely resembles curves of soccer performance versus age. This observation has implications for predicting future performance since acceleration is more easily and more accurately measured than performance.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"9 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140035377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-28DOI: 10.1177/17479541241235595
Matthew J Venn-Moncur, Nimai Parmar, Chris J White, Tom Callingham, Scott B Nicholls
The study provided further validity for the use of the PWOL (percentage of matches which the winner outscored the loser) method within elite hard-court tennis. Over half of the ATP/WTA competitive calendar (January-March and August-November) is played on hard courts so is an important progression. Data from 810 men's and 586 women's hard-court matches across Grand Slams and ATP/WTA World Tours (i.e. Masters, 500s and 250s) between 2019 and 2023 was used for analysis. PWOL was validated alongside two traditionally used statistical methods (paired t-test, point-biserial correlation). Very high agreement between all approaches was shown using Spearman's correlation analysis for both men and women (>0.97). The study further identified the indicators most related to winning performance, identifying baseline points won, first serve points won, points won of 0-4 rally length and Winners:UE Ratio to be most strongly associated with success, whilst forced errors were most associated with losing. Ball three indicators lacked association with match outcome, suggesting any major focus training ‘one-two punches’ on serve should be approached with caution. PWOL has proven to be a valid method for assessing success in elite hard-court tennis (offering potential for wider sports application) to ultimately aid coach decision-making.
{"title":"Validating and identifying KPIs in ATP/WTA hard court tennis match play (2019–2023) using the PWOL method","authors":"Matthew J Venn-Moncur, Nimai Parmar, Chris J White, Tom Callingham, Scott B Nicholls","doi":"10.1177/17479541241235595","DOIUrl":"https://doi.org/10.1177/17479541241235595","url":null,"abstract":"The study provided further validity for the use of the PWOL (percentage of matches which the winner outscored the loser) method within elite hard-court tennis. Over half of the ATP/WTA competitive calendar (January-March and August-November) is played on hard courts so is an important progression. Data from 810 men's and 586 women's hard-court matches across Grand Slams and ATP/WTA World Tours (i.e. Masters, 500s and 250s) between 2019 and 2023 was used for analysis. PWOL was validated alongside two traditionally used statistical methods (paired t-test, point-biserial correlation). Very high agreement between all approaches was shown using Spearman's correlation analysis for both men and women (>0.97). The study further identified the indicators most related to winning performance, identifying baseline points won, first serve points won, points won of 0-4 rally length and Winners:UE Ratio to be most strongly associated with success, whilst forced errors were most associated with losing. Ball three indicators lacked association with match outcome, suggesting any major focus training ‘one-two punches’ on serve should be approached with caution. PWOL has proven to be a valid method for assessing success in elite hard-court tennis (offering potential for wider sports application) to ultimately aid coach decision-making.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"52 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140002860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-27DOI: 10.1177/17479541241234793
Luke Robinson, Andrew Murray, Margo Mountjoy, Fiona Scott, Danny Glover, Daniel Coughlan, Anthony Turner, Chris Bishop
The aim of the study was to provide an understanding of current practices and perceptions of strength and conditioning (S&C) training in female touring professionals. A cross-sectional, explorative survey was undertaken and contained 30 questions separated into four sections: (i) general participant information, (ii) S&C practices, (iii) Likert scale questions on S&C for golf performance, and (iv) knowledge and awareness of S&C. A total of 102 players completed the survey with a combination of multiple-choice questions (MCQs), open-ended questions, and Likert scale style questions utilised throughout. Results showed that ≥94% of players believed that strength and power in both the lower and upper body, in addition to flexibility, were the most important physical characteristics to complement golf shot metrics (e.g. clubhead speed [CHS], ball speed, carry distance, etc.). However, 26% of players conducted S&C training only in the off-season, with 21% suggesting that they had a fear of injury from S&C training. When considering the barriers to undertaking S&C training, the most common reasons included time constraints (20%) and players wanting to prioritise golf practice (15%). Finally, 58% of players believed that training in the weight room should replicate the golf swing. Although it is positive to see that the main physical characteristics for golf are well-understood by professional players, it is also evident that further education and knowledge translation is required relating to the application of S&C training for performance enhancement and injury risk mitigation purposes.
{"title":"Practices and perceptions of strength and conditioning in female golf: A survey study of touring professionals","authors":"Luke Robinson, Andrew Murray, Margo Mountjoy, Fiona Scott, Danny Glover, Daniel Coughlan, Anthony Turner, Chris Bishop","doi":"10.1177/17479541241234793","DOIUrl":"https://doi.org/10.1177/17479541241234793","url":null,"abstract":"The aim of the study was to provide an understanding of current practices and perceptions of strength and conditioning (S&C) training in female touring professionals. A cross-sectional, explorative survey was undertaken and contained 30 questions separated into four sections: (i) general participant information, (ii) S&C practices, (iii) Likert scale questions on S&C for golf performance, and (iv) knowledge and awareness of S&C. A total of 102 players completed the survey with a combination of multiple-choice questions (MCQs), open-ended questions, and Likert scale style questions utilised throughout. Results showed that ≥94% of players believed that strength and power in both the lower and upper body, in addition to flexibility, were the most important physical characteristics to complement golf shot metrics (e.g. clubhead speed [CHS], ball speed, carry distance, etc.). However, 26% of players conducted S&C training only in the off-season, with 21% suggesting that they had a fear of injury from S&C training. When considering the barriers to undertaking S&C training, the most common reasons included time constraints (20%) and players wanting to prioritise golf practice (15%). Finally, 58% of players believed that training in the weight room should replicate the golf swing. Although it is positive to see that the main physical characteristics for golf are well-understood by professional players, it is also evident that further education and knowledge translation is required relating to the application of S&C training for performance enhancement and injury risk mitigation purposes.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"24 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140011261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-26DOI: 10.1177/17479541241231662
Yuming Zhong, Anthony Weldon, Dan Dwyer, Chris Bishop, Yongming Li
The aim of this study was to survey Chinese sport scientists to develop an understanding of their demographics, job characteristics, future career intentions, and opinions. This study adapted online survey and used convenience sampling to investigate the role of sport scientists across China. Ninety-seven practitioners across 18 provinces/municipalities participated in this study. Participants were typically married (70%), male (71%), aged between 30 and 39 (52%), and held a master's degree (66%). Most participants were employed full time (90%) by sport science institutes (66%), with a wide salary range, long working hours (≈48 hours per week), and irregular working time (40%). Most participants remained at the same institute (85%) throughout their careers. The most frequent reason why sport scientists remained in their current position was “ job enjoyment” (4.04/5). The most frequently reported issue encountered by participants was “ opinion differences with sport coaches” (21%). The ability to “gain trust” and “communication” were deemed important in the role of a sport scientist. Approximately half (44%) of the participants were satisfied with their current position and employer, while others wanted promotion (34%) or to leave their role (11%). The results revealed that (1) China's sport scientists are engaged in their current job mainly due to their enthusiasm, (2) their jobs are stable but highly demanding and relatively low paid. Poor working conditions and low retention are evident across Chinese sport scientist roles. Governing bodies should make efforts to improve the work conditions to improve the sustainability of sport scientist roles in the Chinese sport industry.
{"title":"Enthusiasm versus reality: A job analysis of Chinese sport scientists","authors":"Yuming Zhong, Anthony Weldon, Dan Dwyer, Chris Bishop, Yongming Li","doi":"10.1177/17479541241231662","DOIUrl":"https://doi.org/10.1177/17479541241231662","url":null,"abstract":"The aim of this study was to survey Chinese sport scientists to develop an understanding of their demographics, job characteristics, future career intentions, and opinions. This study adapted online survey and used convenience sampling to investigate the role of sport scientists across China. Ninety-seven practitioners across 18 provinces/municipalities participated in this study. Participants were typically married (70%), male (71%), aged between 30 and 39 (52%), and held a master's degree (66%). Most participants were employed full time (90%) by sport science institutes (66%), with a wide salary range, long working hours (≈48 hours per week), and irregular working time (40%). Most participants remained at the same institute (85%) throughout their careers. The most frequent reason why sport scientists remained in their current position was “ job enjoyment” (4.04/5). The most frequently reported issue encountered by participants was “ opinion differences with sport coaches” (21%). The ability to “gain trust” and “communication” were deemed important in the role of a sport scientist. Approximately half (44%) of the participants were satisfied with their current position and employer, while others wanted promotion (34%) or to leave their role (11%). The results revealed that (1) China's sport scientists are engaged in their current job mainly due to their enthusiasm, (2) their jobs are stable but highly demanding and relatively low paid. Poor working conditions and low retention are evident across Chinese sport scientist roles. Governing bodies should make efforts to improve the work conditions to improve the sustainability of sport scientist roles in the Chinese sport industry.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"23 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139979979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-23DOI: 10.1177/17479541241227685
Lauren Burns, Rosanna Stanimirovic, Alex Donaldson
ObjectivesAthletes and coaches rely on their performance support team to optimise training and competition. The specific characteristics of performance support teams that contribute to success in competition from the perspective of athletes and coaches have not been examined. Olympic gold medal winning athletes and coaches were asked about the characteristics they valued in the performance support team members who were with them at the Olympic Games. The insights shared provide important context to the role of the performance support team member, beyond technical skills, in the high-stress environment of elite sporting competition.MethodsConcept mapping was completed online to collect, analyse, and visually represent insights from 30 Olympic gold medal winning athletes and coaches. The concept mapping focus prompt used to generate insights from participants was ‘When I reflect on my gold medal winning performance, a characteristic that I really valued within my support team was….’. Athletes then brainstormed, sorted, and rated relevant statements.ResultsMultidimensional scaling and hierarchical cluster analysis produced an 8-cluster map – Way of Working, Communication Style, Emotional Management in Competition, Teamwork, Commitment to Athlete Preparation, Professionalism, Embracing the Experience, and Equality – as the best visual representation of the way participants sorted the 49 unique brainstormed statements.ConclusionsOlympic gold medal winning athletes and coaches prioritised ways of working, communication style, emotional management, and teamwork as the characteristics they valued most in their performance support team. These constructs, when further examined by item, encourage performance support staff to develop emotional management skills to (a) strengthen interpersonal relationships within the team, (b) enhance the working alliance with athletes and coaches, and (c) contribute to team performance overall. Concept mapping provided a structured way of collecting lived experience insights that may compliment other qualitative approaches such as structured interviews.
{"title":"Characteristics of successful performance support team members at the Olympic games","authors":"Lauren Burns, Rosanna Stanimirovic, Alex Donaldson","doi":"10.1177/17479541241227685","DOIUrl":"https://doi.org/10.1177/17479541241227685","url":null,"abstract":"ObjectivesAthletes and coaches rely on their performance support team to optimise training and competition. The specific characteristics of performance support teams that contribute to success in competition from the perspective of athletes and coaches have not been examined. Olympic gold medal winning athletes and coaches were asked about the characteristics they valued in the performance support team members who were with them at the Olympic Games. The insights shared provide important context to the role of the performance support team member, beyond technical skills, in the high-stress environment of elite sporting competition.MethodsConcept mapping was completed online to collect, analyse, and visually represent insights from 30 Olympic gold medal winning athletes and coaches. The concept mapping focus prompt used to generate insights from participants was ‘When I reflect on my gold medal winning performance, a characteristic that I really valued within my support team was….’. Athletes then brainstormed, sorted, and rated relevant statements.ResultsMultidimensional scaling and hierarchical cluster analysis produced an 8-cluster map – Way of Working, Communication Style, Emotional Management in Competition, Teamwork, Commitment to Athlete Preparation, Professionalism, Embracing the Experience, and Equality – as the best visual representation of the way participants sorted the 49 unique brainstormed statements.ConclusionsOlympic gold medal winning athletes and coaches prioritised ways of working, communication style, emotional management, and teamwork as the characteristics they valued most in their performance support team. These constructs, when further examined by item, encourage performance support staff to develop emotional management skills to (a) strengthen interpersonal relationships within the team, (b) enhance the working alliance with athletes and coaches, and (c) contribute to team performance overall. Concept mapping provided a structured way of collecting lived experience insights that may compliment other qualitative approaches such as structured interviews.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"57 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-23DOI: 10.1177/17479541241231363
Mikayla J Lyons, Jenny A Conlon, Sophia Nimphius, Brad S Keller, Christopher Joyce
This study aimed to compare the perceptions of boys and girls regarding their gender-specific talent development environments (TDEs) in state-level youth soccer. Seventy-one players (girls, n = 35; boys, n = 36) aged 11–18 years completed the Talent Development Environment Questionnaire (TDEQ-5), Sports Motivation Scale (SMS-6), Coach-Athlete Relationship Questionnaire (CART-Q), and Self-Efficacy and Outcome Expectancies (SEOE) of strength training questionnaire. Mann–Whitney U tests and Hedges’s g effect sizes were used to identify group differences. Boys scored higher for TDEQ-5 subdimensions: long-term development focus, alignment of expectations, and holistic quality preparation. For the CART-Q, boys perceived greater coach commitment, whilst girls perceived greater coach complementarity. The SMS-6 results suggested higher amotivation among girls and higher external regulation and introjected regulation among boys. Finally, boys reported greater self-efficacy and outcome expectancies related to strength training. Overall, the findings reveal significant disparities in boys’ and girls’ perceptions of their TDEs. Whilst these findings provide a more nuanced understanding of youth soccer TDEs, further research is necessary to identify the critical factors for effective athlete development regardless of gender, or with more informed considerations of gender. Stakeholders should consider the unique constraints and resources specific to their TDE to determine which strategies may best impact their functionality.
{"title":"An athlete's perspective: Comparing talent development environments for boys and girls in Western Australia youth soccer","authors":"Mikayla J Lyons, Jenny A Conlon, Sophia Nimphius, Brad S Keller, Christopher Joyce","doi":"10.1177/17479541241231363","DOIUrl":"https://doi.org/10.1177/17479541241231363","url":null,"abstract":"This study aimed to compare the perceptions of boys and girls regarding their gender-specific talent development environments (TDEs) in state-level youth soccer. Seventy-one players (girls, n = 35; boys, n = 36) aged 11–18 years completed the Talent Development Environment Questionnaire (TDEQ-5), Sports Motivation Scale (SMS-6), Coach-Athlete Relationship Questionnaire (CART-Q), and Self-Efficacy and Outcome Expectancies (SEOE) of strength training questionnaire. Mann–Whitney U tests and Hedges’s g effect sizes were used to identify group differences. Boys scored higher for TDEQ-5 subdimensions: long-term development focus, alignment of expectations, and holistic quality preparation. For the CART-Q, boys perceived greater coach commitment, whilst girls perceived greater coach complementarity. The SMS-6 results suggested higher amotivation among girls and higher external regulation and introjected regulation among boys. Finally, boys reported greater self-efficacy and outcome expectancies related to strength training. Overall, the findings reveal significant disparities in boys’ and girls’ perceptions of their TDEs. Whilst these findings provide a more nuanced understanding of youth soccer TDEs, further research is necessary to identify the critical factors for effective athlete development regardless of gender, or with more informed considerations of gender. Stakeholders should consider the unique constraints and resources specific to their TDE to determine which strategies may best impact their functionality.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"13 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139957055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-22DOI: 10.1177/17479541241232765
L Pulici, P Randelli, A Pellegrini, M Zago, G Bellistri, R Niccolai, M Galli, E Dellasette, L Tosi, P Volpi
BackgroundYouth football (soccer) players in professional teams face a higher likelihood of injury compared to adults. The interplay between football and injury hinges on the contextual environment. Despite this, a gap in knowledge persists regarding the epidemiology within Italian elite football academies.PurposeAssessing injury incidence and distribution in an Italian professional football academy ( n = 515 from U14 to U18) during match and training to understand injury incidence, severity, types, and related factors.Study designObservational cohort study.MethodsA descriptive epidemiological study was conducted in a football academy (Campionato Nazionale Serie A) from July 2014 to June 2018. We analyzed data from 515 players divided into five age categories (U14 to U18). Injury occurrence was monitored using a custom data reporting tool adhering to FIFA and UEFA injury surveillance protocols. Injury incidence was calculated as the number of injuries/1000 h of exposure. Injury distribution was classified according to severity, location, type, playing position, and period of injuries across different age categories.ResultsEight hundred thirty-two injuries were documented with 4.7 injuries/1000 h of training, 12.4 injuries/1000 h of match and 5.9 injuries/1000 h of total exposure. The months with the lowest number of injuries were June, July, and August ( p < .019). Of all injuries, 430 (51.7%) were caused by trauma, while overuse contributed to 402 injuries (48.3%).ConclusionFindings revealed that injury epidemiology within an Italian professional football academy can be compared to other European countries. These data can serve as a reference for clinicians and sports scientists.
背景与成人相比，职业足球队中的青少年球员更容易受伤。足球与受伤之间的相互作用取决于环境。PurposeAssessing injury incidence and distribution in an Italian professional football academy ( n = 515 from U14 to U18) during match and training to understand injury incidence, severity, types, and related factors.研究设计观察性队列研究.Methods一项描述性流行病学研究在一家足球学校（Campionato Nazionale Serie A）进行，时间为 2014 年 7 月至 2018 年 6 月。我们分析了 515 名球员的数据，这些球员分为五个年龄组（U14 至 U18）。根据国际足联和欧洲足联的伤病监测协议，我们使用定制的数据报告工具对伤病发生情况进行了监测。受伤发生率按受伤次数/1000 小时计算。根据受伤的严重程度、部位、类型、比赛位置和不同年龄段的受伤时间，对受伤分布情况进行分类。 结果共记录了 832 起受伤事件，其中训练受伤次数为 4.7 次/1000 小时，比赛受伤次数为 12.4 次/1000 小时，总受伤次数为 5.9 次/1000 小时。受伤人数最少的月份是 6 月、7 月和 8 月（p < .019）。结论研究结果表明，意大利职业足球学校的受伤流行病学可与其他欧洲国家进行比较。这些数据可供临床医生和体育科学家参考。
{"title":"Injuries in elite football (soccer) academy: A 4-year observational cohort study of five categories and 515 players","authors":"L Pulici, P Randelli, A Pellegrini, M Zago, G Bellistri, R Niccolai, M Galli, E Dellasette, L Tosi, P Volpi","doi":"10.1177/17479541241232765","DOIUrl":"https://doi.org/10.1177/17479541241232765","url":null,"abstract":"BackgroundYouth football (soccer) players in professional teams face a higher likelihood of injury compared to adults. The interplay between football and injury hinges on the contextual environment. Despite this, a gap in knowledge persists regarding the epidemiology within Italian elite football academies.PurposeAssessing injury incidence and distribution in an Italian professional football academy ( n = 515 from U14 to U18) during match and training to understand injury incidence, severity, types, and related factors.Study designObservational cohort study.MethodsA descriptive epidemiological study was conducted in a football academy (Campionato Nazionale Serie A) from July 2014 to June 2018. We analyzed data from 515 players divided into five age categories (U14 to U18). Injury occurrence was monitored using a custom data reporting tool adhering to FIFA and UEFA injury surveillance protocols. Injury incidence was calculated as the number of injuries/1000 h of exposure. Injury distribution was classified according to severity, location, type, playing position, and period of injuries across different age categories.ResultsEight hundred thirty-two injuries were documented with 4.7 injuries/1000 h of training, 12.4 injuries/1000 h of match and 5.9 injuries/1000 h of total exposure. The months with the lowest number of injuries were June, July, and August ( p < .019). Of all injuries, 430 (51.7%) were caused by trauma, while overuse contributed to 402 injuries (48.3%).ConclusionFindings revealed that injury epidemiology within an Italian professional football academy can be compared to other European countries. These data can serve as a reference for clinicians and sports scientists.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"2 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.1177/17479541241227527
Thimo Wiewelhove, Christoph Schneider, Michael Kellmann, Mark Pfeiffer, Tim Meyer, Alexander Ferrauti
The nine-year multicenter research project, titled REGman—Optimization of Training and Competition: Management of Regeneration in Elite Sports—aimed to advance the understanding of recovery management in sports and generate practical recommendations. In this article, we outline the overarching research program that links the specific research strands and outputs during the two federal funding cycles (2012–2021) and summarize the main project findings. The two-stage conceptual framework involved investigating monitoring measures for short-term fatigue and recovery, as well as assessing the efficacy of various recovery interventions. These interventions encompassed psychological relaxation and recovery strategies, sleep, cooling techniques like precooling, percooling, cold water immersion, or whole-body cryotherapy, compression garments, active recovery, stretching, heating interventions such as sauna or contrast water therapy, massage, and foam rolling. The findings revealed inconclusive or marginal effects of recovery interventions at the group level, while indicating possible interindividual differences in responses. Additionally, the findings highlighted the effectiveness of diverse monitoring measures, showing satisfactory sensitivity in tracking performance changes related to fatigue and recovery. The use of individualized reference ranges significantly improved classification accuracy compared to group-based reference ranges. Athletes and coaches are encouraged to prioritize fundamental aspects of training and recovery: meticulous training planning and execution, effective sleep management, and proper nutrition. Furthermore, monitoring and analyzing individual responses, even though it demands suitable methodologies and presents challenges in high-performance sports environments, can yield valuable insights for personalized recovery management. If these aspects are comprehensively addressed, and resources allow, additional recovery strategies might be explored.
{"title":"Recovery management in sport: Overview and outcomes of a nine-year multicenter research program","authors":"Thimo Wiewelhove, Christoph Schneider, Michael Kellmann, Mark Pfeiffer, Tim Meyer, Alexander Ferrauti","doi":"10.1177/17479541241227527","DOIUrl":"https://doi.org/10.1177/17479541241227527","url":null,"abstract":"The nine-year multicenter research project, titled REGman—Optimization of Training and Competition: Management of Regeneration in Elite Sports—aimed to advance the understanding of recovery management in sports and generate practical recommendations. In this article, we outline the overarching research program that links the specific research strands and outputs during the two federal funding cycles (2012–2021) and summarize the main project findings. The two-stage conceptual framework involved investigating monitoring measures for short-term fatigue and recovery, as well as assessing the efficacy of various recovery interventions. These interventions encompassed psychological relaxation and recovery strategies, sleep, cooling techniques like precooling, percooling, cold water immersion, or whole-body cryotherapy, compression garments, active recovery, stretching, heating interventions such as sauna or contrast water therapy, massage, and foam rolling. The findings revealed inconclusive or marginal effects of recovery interventions at the group level, while indicating possible interindividual differences in responses. Additionally, the findings highlighted the effectiveness of diverse monitoring measures, showing satisfactory sensitivity in tracking performance changes related to fatigue and recovery. The use of individualized reference ranges significantly improved classification accuracy compared to group-based reference ranges. Athletes and coaches are encouraged to prioritize fundamental aspects of training and recovery: meticulous training planning and execution, effective sleep management, and proper nutrition. Furthermore, monitoring and analyzing individual responses, even though it demands suitable methodologies and presents challenges in high-performance sports environments, can yield valuable insights for personalized recovery management. If these aspects are comprehensively addressed, and resources allow, additional recovery strategies might be explored.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"242 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-01DOI: 10.1177/17479541231223161
Emily Ruxton Shull, Russell R Pate, Kerry McIver, Eva Monsma, Alexander C McLain
The purpose of this study was to examine how coaching behaviors, coaching experience, and coach training relate to physical activity (PA) levels of children during their participation in a youth sport program. Youth soccer teams (N = 27) serving children ages 6–11 years were directly observed during one practice using momentary time-sampling procedures consisting of 30-s intervals (10-s observation, 20-s recording). Team coaches reported prior coaching experience, training, and demographic characteristics. Multilevel logistic regression was conducted to describe associations between coaching behaviors and intensity of children's PA. Interaction terms were added to the models to determine if the associations differed across girls-only, boys-only, and coed teams. ANOVAs were used to describe associations between coaching experience, coach training, and team PA level. Children were more likely to engage in moderate or vigorous PA when coaches were watching without verbal feedback (Odds Ratio [OR], 3.2, 95% CI = 1.70–5.83) or watching with verbal feedback (OR, 2.1, 95% CI = 1.27–3.59), compared to when the coach was disengaged, regardless of team sex composition. The number of prior seasons coached was positively related to team PA levels. These findings can be used to inform coaching strategies for promoting increased PA during youth sport practices.
本研究旨在探讨教练行为、教练经验和教练培训与儿童参加青少年体育项目期间的体育活动（PA）水平之间的关系。研究人员在一次训练中直接观察了为 6-11 岁儿童服务的青少年足球队（N = 27），观察采用瞬间时间取样程序，时间间隔为 30 秒（观察 10 秒，记录 20 秒）。球队教练报告了之前的执教经验、培训情况和人口统计学特征。多层次逻辑回归用于描述教练行为与儿童体育锻炼强度之间的关联。在模型中加入了交互项，以确定在只有女孩参加的球队、只有男孩参加的球队和男女混合球队中，两者之间的关系是否存在差异。方差分析用于描述教练经验、教练培训和球队体育锻炼水平之间的关联。与教练不参与时相比，无论球队性别组成如何，当教练在旁观看但无口头反馈时（OR，3.2，95% CI = 1.70-5.83）或在旁观看但有口头反馈时（OR，2.1，95% CI = 1.27-3.59），孩子们更有可能参与中等强度或剧烈强度的体育锻炼。之前执教的赛季数与球队的 PA 水平呈正相关。这些研究结果可用于制定教练策略，以促进青少年在体育锻炼中增加运动量。
{"title":"The influence of coaching behaviors, experience, and training on children's physical activity levels during youth sport practices","authors":"Emily Ruxton Shull, Russell R Pate, Kerry McIver, Eva Monsma, Alexander C McLain","doi":"10.1177/17479541231223161","DOIUrl":"https://doi.org/10.1177/17479541231223161","url":null,"abstract":"The purpose of this study was to examine how coaching behaviors, coaching experience, and coach training relate to physical activity (PA) levels of children during their participation in a youth sport program. Youth soccer teams (N = 27) serving children ages 6–11 years were directly observed during one practice using momentary time-sampling procedures consisting of 30-s intervals (10-s observation, 20-s recording). Team coaches reported prior coaching experience, training, and demographic characteristics. Multilevel logistic regression was conducted to describe associations between coaching behaviors and intensity of children's PA. Interaction terms were added to the models to determine if the associations differed across girls-only, boys-only, and coed teams. ANOVAs were used to describe associations between coaching experience, coach training, and team PA level. Children were more likely to engage in moderate or vigorous PA when coaches were watching without verbal feedback (Odds Ratio [OR], 3.2, 95% CI = 1.70–5.83) or watching with verbal feedback (OR, 2.1, 95% CI = 1.27–3.59), compared to when the coach was disengaged, regardless of team sex composition. The number of prior seasons coached was positively related to team PA levels. These findings can be used to inform coaching strategies for promoting increased PA during youth sport practices.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":"142 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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