Pub Date : 2023-10-03DOI: 10.1080/24748668.2023.2266326
Qinglou Xu, Changjing Xi, Ruiqiu Mao
ABSTRACTThe paper aims to compare the kinematic performance of the rear hooks of college boxers of different sexes and analyse the influence of the kinematic indexes on punching speed. Thirteen kinematic indexes were selected to analyse the rear hook of male (n = 20) and female (n = 20) college boxers through a three-dimensional framework and high-speed camera. Additionally, a stepwise multiple linear regression equation was established to analyse the influence of these parameters on the maximum punching speed. The results revealed that the rear hook punching speed of college male boxers was 26% faster than that of female boxers. Also, there were statistically significant differences in the maximum angular velocity of the shoulder joint, hip joint angle, and knee joint angle (p < 0.01). In addition, the differences between their X- and Y-axis centre of gravity positions were statistically significant (p < 0.01). Moreover, the multiple regression analysis revealed that the maximum shoulder velocity was the most influential factor in the maximum punching speed of the rear hooks for both male and female boxers. This study provides recommendations for the daily training of college boxers and their coaches, to develop targeted training interventions for the rear hook.KEYWORDS: Combat sportsboxingbiomechanics Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Comparison of kinematic performance and analysis of the effect of punching speed of rear hook of college boxers of different sexes","authors":"Qinglou Xu, Changjing Xi, Ruiqiu Mao","doi":"10.1080/24748668.2023.2266326","DOIUrl":"https://doi.org/10.1080/24748668.2023.2266326","url":null,"abstract":"ABSTRACTThe paper aims to compare the kinematic performance of the rear hooks of college boxers of different sexes and analyse the influence of the kinematic indexes on punching speed. Thirteen kinematic indexes were selected to analyse the rear hook of male (n = 20) and female (n = 20) college boxers through a three-dimensional framework and high-speed camera. Additionally, a stepwise multiple linear regression equation was established to analyse the influence of these parameters on the maximum punching speed. The results revealed that the rear hook punching speed of college male boxers was 26% faster than that of female boxers. Also, there were statistically significant differences in the maximum angular velocity of the shoulder joint, hip joint angle, and knee joint angle (p < 0.01). In addition, the differences between their X- and Y-axis centre of gravity positions were statistically significant (p < 0.01). Moreover, the multiple regression analysis revealed that the maximum shoulder velocity was the most influential factor in the maximum punching speed of the rear hooks for both male and female boxers. This study provides recommendations for the daily training of college boxers and their coaches, to develop targeted training interventions for the rear hook.KEYWORDS: Combat sportsboxingbiomechanics Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":14248,"journal":{"name":"International Journal of Performance Analysis in Sport","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135743625","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 : 2023-09-28DOI: 10.1080/24748668.2023.2262813
Adrián Martín-Castellanos, Marina Rueda Flores, Diego Muriarte Solana, Roberto López Del Campo, Fabio Nevado Garrosa, Daniel Mon-López
ABSTRACTThe behaviour adopted by football teams during matches is defined as their playing style and is a key area for performance analysis. This study aimed to identify the playing styles of LaLiga teams considering match outcome and overall comparison, during a season. The sample was collected from the 2020/2021 LaLiga, consisting of 380 matches, with a total of 760 records. In this research, technical (12), tactical (six) and physical (seven) variables were selected, as well as three variables related to goalkeeper performance, totalling a count of 28 performance indicators. A principal component analysis with orthogonal Varimax rotation was performed. As a result, the models explained more than 76% of the total variance, identifying six main factors or playing styles. These styles were recognised as build-up, high pressing, high-intensity play, direct play, use of crosses and high distance in the opposition half. Compared to previous research conducted in other leagues, five of the six styles could be identified in advance, but not the high-distance style, which only occurred in draws and wins. The use of crosses was identified for victories or defeats. Coaches, analysts and sport scientists could take these playing styles into account for analysis and match preparation.KEYWORDS: Soccerprincipal component analysisperformance analysisSpanish leagueanalyst AcknowledgementAs part of the doctoral thesis of the first author, we would like to thank LaLiga for providing the data necessary to carry out the study.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplemental dataSupplemental data for this article can be accessed online at https://doi.org/10.1080/24748668.2023.2262813.
{"title":"How do the football teams play in LaLiga? Analysis and comparison of playing styles according to the outcome","authors":"Adrián Martín-Castellanos, Marina Rueda Flores, Diego Muriarte Solana, Roberto López Del Campo, Fabio Nevado Garrosa, Daniel Mon-López","doi":"10.1080/24748668.2023.2262813","DOIUrl":"https://doi.org/10.1080/24748668.2023.2262813","url":null,"abstract":"ABSTRACTThe behaviour adopted by football teams during matches is defined as their playing style and is a key area for performance analysis. This study aimed to identify the playing styles of LaLiga teams considering match outcome and overall comparison, during a season. The sample was collected from the 2020/2021 LaLiga, consisting of 380 matches, with a total of 760 records. In this research, technical (12), tactical (six) and physical (seven) variables were selected, as well as three variables related to goalkeeper performance, totalling a count of 28 performance indicators. A principal component analysis with orthogonal Varimax rotation was performed. As a result, the models explained more than 76% of the total variance, identifying six main factors or playing styles. These styles were recognised as build-up, high pressing, high-intensity play, direct play, use of crosses and high distance in the opposition half. Compared to previous research conducted in other leagues, five of the six styles could be identified in advance, but not the high-distance style, which only occurred in draws and wins. The use of crosses was identified for victories or defeats. Coaches, analysts and sport scientists could take these playing styles into account for analysis and match preparation.KEYWORDS: Soccerprincipal component analysisperformance analysisSpanish leagueanalyst AcknowledgementAs part of the doctoral thesis of the first author, we would like to thank LaLiga for providing the data necessary to carry out the study.Disclosure statementNo potential conflict of interest was reported by the author(s).Supplemental dataSupplemental data for this article can be accessed online at https://doi.org/10.1080/24748668.2023.2262813.","PeriodicalId":14248,"journal":{"name":"International Journal of Performance Analysis in Sport","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135385347","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 : 2023-09-27DOI: 10.1080/24748668.2023.2262837
James Bletsoe, Sarah Whitehead, Jamie Poolton, Thomas Sawzcuk, Kevin Till
This study aimed to (1) compare individual player match action characteristics between scholarship, academy, and senior (European Super League, ESL) levels of the rugby league player pathway, and (2) compare match actions between players that have progressed to play ESL and those that did not. Data was collected on 147 players from 95 senior, 69 academy, and 23 scholarship matches over three seasons. Matches were filmed via 2 angles and 26 match action characteristics (e.g. carry, missed tackle) were coded. Linear mixed models identified 48 significant differences in match action characteristics when accounting for playing position between playing levels. Over seventy percent of the differences were defensive match actions, indicating there are higher defensive match demands in the ESL when compared to academy and scholarship match play. Seven and eleven match actions characteristics were identified at scholarship and academy levels that differentiated between players who had progressed to play in the ESL and those who had not. All but one of these characteristics were attacking match actions, indicating a player’s attacking qualities are important in their progression to the ESL. These results have implications for both talent identification and long-term athlete development in rugby league.
{"title":"A comparison of the match action characteristics of scholarship, academy, and senior rugby league: influence on career progression","authors":"James Bletsoe, Sarah Whitehead, Jamie Poolton, Thomas Sawzcuk, Kevin Till","doi":"10.1080/24748668.2023.2262837","DOIUrl":"https://doi.org/10.1080/24748668.2023.2262837","url":null,"abstract":"This study aimed to (1) compare individual player match action characteristics between scholarship, academy, and senior (European Super League, ESL) levels of the rugby league player pathway, and (2) compare match actions between players that have progressed to play ESL and those that did not. Data was collected on 147 players from 95 senior, 69 academy, and 23 scholarship matches over three seasons. Matches were filmed via 2 angles and 26 match action characteristics (e.g. carry, missed tackle) were coded. Linear mixed models identified 48 significant differences in match action characteristics when accounting for playing position between playing levels. Over seventy percent of the differences were defensive match actions, indicating there are higher defensive match demands in the ESL when compared to academy and scholarship match play. Seven and eleven match actions characteristics were identified at scholarship and academy levels that differentiated between players who had progressed to play in the ESL and those who had not. All but one of these characteristics were attacking match actions, indicating a player’s attacking qualities are important in their progression to the ESL. These results have implications for both talent identification and long-term athlete development in rugby league.","PeriodicalId":14248,"journal":{"name":"International Journal of Performance Analysis in Sport","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135581330","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 : 2023-09-19DOI: 10.1080/24748668.2023.2260623
Puš Katarina, Hadžić Vedran, Spudić Darjan
ABSTRACTThe main purpose of the study was to analyse the relationship between the Nordic hamstring (NH) and the gold standard isokinetic eccentric strength measurements at three different eccentric velocities (30°, 60°, and 90°/s). Twenty-seven (15 male, 12 female) physical education students, experienced in strength training, performed isokinetic and NH tests. The results of the isokinetic hamstring strength test were statistically significantly higher compared to the results of the NH test, regardless of the velocity of the isokinetic test. The correlations observed ranged from moderate to large (0.419 ≤ r ≤ 0.582) and were statistically significant for the left leg, right leg, and the average results between the legs. However, no statistically significant correlations were found between the measures for inter-leg symmetry variables. We observed excellent intra-session reliability of the NH test results (ICC2.1 = 0.891–920), but only good reliability (ICC2.1 = 0.601) for the intra-leg symmetry variable. Although NH strength measurements were found to be highly reliable, sports practitioners should be aware of the discrepancy between the measures and interpret the results carefully. Eccentric hamstring strength and inter-leg symmetry cannot be evaluated interchangeably with the NH test and gold standard isokinetic test performed in the 90° hip flexion position.KEYWORDS: asymmetryvalidityreliabilitybiceps femorislengthening contraction AcknowledgementsThe authors would like to thank the participants for their cooperation.Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThe Slovenian Research Agency provided authors D.S. and V.H. with support in the form of salary through the programmes ‘Kinesiology of monostructural, polystructural and conventional sports’ [P5‐0147]. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
{"title":"Relationship between the Nordic hamstring strength test and isokinetic hamstring strength test at different eccentric contraction velocities","authors":"Puš Katarina, Hadžić Vedran, Spudić Darjan","doi":"10.1080/24748668.2023.2260623","DOIUrl":"https://doi.org/10.1080/24748668.2023.2260623","url":null,"abstract":"ABSTRACTThe main purpose of the study was to analyse the relationship between the Nordic hamstring (NH) and the gold standard isokinetic eccentric strength measurements at three different eccentric velocities (30°, 60°, and 90°/s). Twenty-seven (15 male, 12 female) physical education students, experienced in strength training, performed isokinetic and NH tests. The results of the isokinetic hamstring strength test were statistically significantly higher compared to the results of the NH test, regardless of the velocity of the isokinetic test. The correlations observed ranged from moderate to large (0.419 ≤ r ≤ 0.582) and were statistically significant for the left leg, right leg, and the average results between the legs. However, no statistically significant correlations were found between the measures for inter-leg symmetry variables. We observed excellent intra-session reliability of the NH test results (ICC2.1 = 0.891–920), but only good reliability (ICC2.1 = 0.601) for the intra-leg symmetry variable. Although NH strength measurements were found to be highly reliable, sports practitioners should be aware of the discrepancy between the measures and interpret the results carefully. Eccentric hamstring strength and inter-leg symmetry cannot be evaluated interchangeably with the NH test and gold standard isokinetic test performed in the 90° hip flexion position.KEYWORDS: asymmetryvalidityreliabilitybiceps femorislengthening contraction AcknowledgementsThe authors would like to thank the participants for their cooperation.Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThe Slovenian Research Agency provided authors D.S. and V.H. with support in the form of salary through the programmes ‘Kinesiology of monostructural, polystructural and conventional sports’ [P5‐0147]. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.","PeriodicalId":14248,"journal":{"name":"International Journal of Performance Analysis in Sport","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135014543","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 : 2023-09-09DOI: 10.1080/24748668.2023.2256120
Rouli Ye, Delong Zhao, Meng Zhang, Wenming Liu
ABSTRACT This study presents an in-depth analysis of the serve in men’s singles tennis matches at Wimbledon based on game theory, with the quantitative tool of the stroke performance relevance (SPR) model. This model quantifies tennis tactics more precisely, taking “each stroke” as the observation unit, and it includes scoring, losing points, and sequential information. Unlike traditional methods that consider “each point”, the SPR metrics captures the role of specific technical actions throughout the match more comprehensively. While standard serve data like aces and double faults have no significant impact on match outcomes, the serve SPR index does. In a game matrix model with two pure strategy Nash equilibria, both the winner and loser show higher SPR indices than those with fewer equilibria. Winners consistently exhibited a higher serve SPR index, indicating that the two pure strategy Nash equilibria significantly influenced match outcomes on grass courts. This underscores the role of tactical strategies and Nash equilibrium in determining match results, offering scientific and theoretical support for tennis athletes’ and coaches’ tactics.
{"title":"Nash equilibrium and tennis serve performance: a game theory analysis","authors":"Rouli Ye, Delong Zhao, Meng Zhang, Wenming Liu","doi":"10.1080/24748668.2023.2256120","DOIUrl":"https://doi.org/10.1080/24748668.2023.2256120","url":null,"abstract":"ABSTRACT This study presents an in-depth analysis of the serve in men’s singles tennis matches at Wimbledon based on game theory, with the quantitative tool of the stroke performance relevance (SPR) model. This model quantifies tennis tactics more precisely, taking “each stroke” as the observation unit, and it includes scoring, losing points, and sequential information. Unlike traditional methods that consider “each point”, the SPR metrics captures the role of specific technical actions throughout the match more comprehensively. While standard serve data like aces and double faults have no significant impact on match outcomes, the serve SPR index does. In a game matrix model with two pure strategy Nash equilibria, both the winner and loser show higher SPR indices than those with fewer equilibria. Winners consistently exhibited a higher serve SPR index, indicating that the two pure strategy Nash equilibria significantly influenced match outcomes on grass courts. This underscores the role of tactical strategies and Nash equilibrium in determining match results, offering scientific and theoretical support for tennis athletes’ and coaches’ tactics.","PeriodicalId":14248,"journal":{"name":"International Journal of Performance Analysis in Sport","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136192250","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 : 2023-09-09DOI: 10.1080/24748668.2023.2255818
Enrique Moreno-Mañas, Xavier García-Massó, Salvador Llana-Belloch
The popularity of 29-inch mountain bike wheels for cross-country races has been increasing since 2010, but scientific studies supporting their benefits are very scarce. The aim of this study was to analyse the effect of the different bicycle version (i.e. 26 vs 29-inch) in terrain with varying inclinations. Our results indicated that for full laps, the 29” version was slightly faster than 26” version (15.92 vs. 15.74 km/h; p < .001). No differences in the power outputs for these two conditions were reported (p > .05), but a higher mean heart rate (p = .009) was obtained for the riders using the bike with the 29” wheels (167.84 vs. 167.19 bpm; p < .015). Similar results were obtained for the uphill and flat sections, however, there were no differences (p > .05) between the bikes during the downhill sections for any of the studied variables. In conclusion, the 29” version performed better on the flat or uphill terrain but their use also resulted in increased rider heart rates compared to those using the 26”-inch version; no differences were reported for the downhill terrain. This information is relevant to MTB cyclists and could help them to improve their performance.
{"title":"Performance differences between 26 and 29-inch wheels in cross-country mountain biking","authors":"Enrique Moreno-Mañas, Xavier García-Massó, Salvador Llana-Belloch","doi":"10.1080/24748668.2023.2255818","DOIUrl":"https://doi.org/10.1080/24748668.2023.2255818","url":null,"abstract":"The popularity of 29-inch mountain bike wheels for cross-country races has been increasing since 2010, but scientific studies supporting their benefits are very scarce. The aim of this study was to analyse the effect of the different bicycle version (i.e. 26 vs 29-inch) in terrain with varying inclinations. Our results indicated that for full laps, the 29” version was slightly faster than 26” version (15.92 vs. 15.74 km/h; p < .001). No differences in the power outputs for these two conditions were reported (p > .05), but a higher mean heart rate (p = .009) was obtained for the riders using the bike with the 29” wheels (167.84 vs. 167.19 bpm; p < .015). Similar results were obtained for the uphill and flat sections, however, there were no differences (p > .05) between the bikes during the downhill sections for any of the studied variables. In conclusion, the 29” version performed better on the flat or uphill terrain but their use also resulted in increased rider heart rates compared to those using the 26”-inch version; no differences were reported for the downhill terrain. This information is relevant to MTB cyclists and could help them to improve their performance.","PeriodicalId":14248,"journal":{"name":"International Journal of Performance Analysis in Sport","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136107594","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：