Journal of Sports Sciences最新文献

DRL-driven padel players: Simulating padel matches through deep reinforcement learning in real and hypothetical scenarios. drl驱动的模式玩家：通过深度强化学习在真实和假设场景中模拟模式匹配。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-18 DOI: 10.1080/02640414.2025.2518693

Mohammadreza Javadiha, Jia Long Ji, Wenqi Zhou, Enrique Lacasa, Carlos Andújar

{"title":"DRL-driven padel players: Simulating padel matches through deep reinforcement learning in real and hypothetical scenarios.","authors":"Mohammadreza Javadiha, Jia Long Ji, Wenqi Zhou, Enrique Lacasa, Carlos Andújar","doi":"10.1080/02640414.2025.2518693","DOIUrl":"10.1080/02640414.2025.2518693","url":null,"abstract":"Recent advances in Deep Reinforcement Learning (DRL) have opened new avenues for sport research. DRL allows virtual agents to learn and solve complex tasks with minimal input, which means that models can be trained with little or no data collection. This enables the creation of sport simulations that go beyond the replication of real matches, exploring entirely new conditions where prior knowledge is limited. In this paper, we investigate the generation of simulated data for padel matches, aiming to either replicate real environments or investigate hypothetical ones with altered parameters such as non-standard court sizes. We focus on high-level behavioural aspects of the players rather than low-level skills. We present a proof-of-concept implementation of a DRL system that enables robot-like agents to learn and play padel under varying conditions. After training different types of virtual agents, we observed their overall behaviour during simulated matches. In particular, for certain combinations of parameters, the agents learned to coordinate their movements similarly to professional players. We argue that DRL-driven players have the potential to complement traditional mathematical models, especially in scenarios where data collection is challenging or unfeasible. This could lead to more engaging, safer and more inclusive sports in the future.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1742-1761"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the influence of ecological dynamics on player density metrics in junior Australian Football. 调查生态动态对澳大利亚青少年足球运动员密度指标的影响。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-18 DOI: 10.1080/02640414.2025.2521209

Thomas Sutherland, Machar Reid, Brendan Lay, Troy Kirkham, Peter Peeling

{"title":"Investigating the influence of ecological dynamics on player density metrics in junior Australian Football.","authors":"Thomas Sutherland, Machar Reid, Brendan Lay, Troy Kirkham, Peter Peeling","doi":"10.1080/02640414.2025.2521209","DOIUrl":"10.1080/02640414.2025.2521209","url":null,"abstract":"Player density can largely influence skill development in junior sport. Accordingly, we aimed to evaluate how player density metrics change in the context of the ecological dynamics framework in community-level junior Australian Football (AF). Game footage (n = 68 games) from under (U)9-U14 were analysed for player density metrics, sub-categorised as: ball-up metrics (total number of ball-ups, repeat ball-ups, clearances, and the number of players at a ball-up [within 3 m]), pressure (i.e. physical, closing, chasing, none, set), and opposition count (number of opposition players within 3 m of a disposal). Linear regression models analysed each player density metric, accounting for variables such as age, sex, relative area per player (RAPP), number of players in the game, and weather. Girls had more total and repeat ball-ups per game than boys (both p < 0.001). Younger age-groups experienced more players around ball-ups (p < 0.05). Total ball-ups were reduced with increased RAPP (p = 0.006). Physical pressure was not influenced by any variable, but occurred most frequently across all cohorts. This study provides novel exploration of player density metrics in junior AF, highlighting increased density experienced by younger age-groups and girls at ball-ups. These findings also suggest RAPP manipulation as a practical method of reducing ball-up frequency in junior AF.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1808-1818"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction. 修正。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-07-17 DOI: 10.1080/02640414.2025.2533614

引用次数: 0

Effects of concurrent training on maximal and explosive strength in trained individuals: Insights from the load-velocity relationship. 同时训练对训练个体最大力量和爆发力量的影响：来自负荷-速度关系的见解。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-13 DOI: 10.1080/02640414.2025.2518827

Miguel Gomes, Afonso Fitas, Paulo Santos, Pedro Pezarat-Correia, Goncalo V Mendonca

{"title":"Effects of concurrent training on maximal and explosive strength in trained individuals: Insights from the load-velocity relationship.","authors":"Miguel Gomes, Afonso Fitas, Paulo Santos, Pedro Pezarat-Correia, Goncalo V Mendonca","doi":"10.1080/02640414.2025.2518827","DOIUrl":"10.1080/02640414.2025.2518827","url":null,"abstract":"This study explored the effects of concurrent-training (CT), resistance-only (R) and endurance-only (E) training on back squat one-repetition maximum (1RM), load-velocity profile (LVP) parameters and countermovement jump (CMJ). Thirty trained males were randomised into three groups (E, R, CT) and trained thrice-weekly for 11-weeks. R and CT groups completed a two-phase resistance training programme: maximal-strength (weeks 1-5) and explosive-strength (weeks 6-11). E and CT groups performed 30-minutes of running within the moderate-to-heavy-intensity domains. CT involved resistance followed by endurance training. LVP parameters (L0, V0, Slope and Aline), 1RM and CMJ height were assessed at baseline, mid-training and post-training. Back squat 1RM increased similarly in R and CT groups during the first phase but only in R during the second phase. CMJ height increased throughout both phases for R but only during the second for CT. R increased V0 and decreased Slope in both phases, while CT exhibited similar changes only during the second phase. Aline increased in R and CT during the first phase but improved only in R during the second. No significant changes occurred in the E group. CT impaired maximal and explosive strength adaptations compared to R, highlighting the need for tailored programmes to reduce interference effects.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1762-1782"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A daily longitudinal analysis of reciprocal relationships between psychological states and performance in NHL players. 每日对NHL球员心理状态与表现相互关系的纵向分析。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-18 DOI: 10.1080/02640414.2025.2521593

Johan Forsberg, Anna Lallo, Andreas Ivarsson, Andreas Stenling, Kristen Dieffenbach, John Lind, Erik Lundkvist

{"title":"A daily longitudinal analysis of reciprocal relationships between psychological states and performance in NHL players.","authors":"Johan Forsberg, Anna Lallo, Andreas Ivarsson, Andreas Stenling, Kristen Dieffenbach, John Lind, Erik Lundkvist","doi":"10.1080/02640414.2025.2521593","DOIUrl":"10.1080/02640414.2025.2521593","url":null,"abstract":"This study aimed to explore the temporal relationships between psychological states and performance among players in the National Hockey League (NHL). We used an intensive longitudinal design, with 22 players reporting their psychological states daily between 7 February 2024, and 14 March 2024. Performance was measured using Game Score (GS), a composite metric based on weighted performance variables to provide an overall objective measure of individual performance, commonly used by teams in the NHL. Bayesian multilevel models were utilised to analyse the data, focusing on temporal effects between psychological states and performance. The results showed that none of the other psychological states predicted subsequent performance. In the opposite direction, performance predicted several different psychological states the following day, where better performance positively predicted positive states and negatively predicted negative states. In summary, psychological states appear to have a small effect on how NHL players perform, whereas how they perform seem to affect a wide range of psychological states the following day.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1835-1844"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic keys to alpine skiing performance: A 3-D analysis of ground reaction forces and torques. 动力学键高山滑雪性能：地面反作用力和扭矩的三维分析。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-18 DOI: 10.1080/02640414.2025.2518677

Clément Delhaye, Matt R Cross, Maximilien Bowen, Baptiste Morel, Pierre Samozino, Frédérique Hintzy

{"title":"Kinetic keys to alpine skiing performance: A 3-D analysis of ground reaction forces and torques.","authors":"Clément Delhaye, Matt R Cross, Maximilien Bowen, Baptiste Morel, Pierre Samozino, Frédérique Hintzy","doi":"10.1080/02640414.2025.2518677","DOIUrl":"10.1080/02640414.2025.2518677","url":null,"abstract":"Alpine skiing performance hinges on the dynamic interaction between the skier and the ski-snow interface. Ground reaction forces are fundamental in controlling these interactions, yet surprisingly little research exists characterising 3-D turn kinetics. This study aimed to profile the evolution of ground reaction forces and torques signatures applied by skiers during turning and explore their link with giant slalom performance. Seventeen male alpine skiers with varying skill levels, equipped with ski-mounted force plates, executed multiple trials on a giant slalom ski course. A statistical parametric mapping approach was used to explore relationships between normal force and anteroposterior torque signatures with race times. Faster race times were correlated with greater normal force during the plateau phase of the turn crux (p < 0.001) and lower during turn switch (p = 0.006). Better times were also associated with higher positive (p = 0.004) and negative (p < 0.001) rates of force development. The best skiers appeared to apply an elevated positive My plateau (p < 0.001) with a steeper slope (p = 0.029) on the inside ski at turn initiation. Our findings indicate generating large forces and rapidly modulating their application to the skis is a crucial aspect of skiing performance.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1731-1741"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144326052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reliability and validity of lower extremity and trunk kinematics measured with markerless motion capture during sports-related and functional tasks: A systematic review. 在运动相关和功能任务中，用无标记运动捕捉测量下肢和躯干运动学的可靠性和有效性：一项系统综述。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-17 DOI: 10.1080/02640414.2025.2518359

Matias Yoma, Luis Llurda-Almuzara, Lee Herrington, Richard Jones

{"title":"Reliability and validity of lower extremity and trunk kinematics measured with markerless motion capture during sports-related and functional tasks: A systematic review.","authors":"Matias Yoma, Luis Llurda-Almuzara, Lee Herrington, Richard Jones","doi":"10.1080/02640414.2025.2518359","DOIUrl":"10.1080/02640414.2025.2518359","url":null,"abstract":"This study reviewed the literature regarding reliability and validity of markerless motion capture (MMC) for measuring lower extremities and trunk kinematics during sports-related and functional tasks. Articles published until 28 February 2024 were assessed. Studies were included if they assessed walking, squatting, jumping/landing, running, or cutting. After screening, 53 studies were included in the review. Variability across task characteristics, MMC systems, and statistical analyses was observed. The relative reliability of MMC, measured by intraclass correlation coefficient (ICC), ranged from low to excellent, with most variables showing standard error of measurement (SEM) values below 5°. Squats and landing tasks reported the highest reliability, with good to excellent ICC and most joints reporting SEM values < 5°, except for hip flexion (4.0°to 11.1°). Validity studies (compared to marker-based motion capture) showed differences between technologies ranging from 0.2° to 28.6° and correlations negligible (including negative values) to very strong, depending on the task, plane of motion, and joints analysed. Hip angle in frontal plane reported the lowest differences between technologies across tasks. MMC systems provide reliable measurements for most kinematic variables but are not largely comparable to marker-based systems. MMC reliability creates opportunities to develop more ecological valid research outside traditional biomechanical laboratory settings.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1703-1730"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144317199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sports bra tightness affects respiratory muscle fatigue, breathing pattern, and perceptual responses during running. 运动胸罩紧绷会影响呼吸肌肉疲劳、呼吸模式和跑步时的知觉反应。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-29 DOI: 10.1080/02640414.2025.2526277

Eric Harbour, Rosanna Farlock, David Marko, Petr Bahenský, Hermann Schwameder

{"title":"Sports bra tightness affects respiratory muscle fatigue, breathing pattern, and perceptual responses during running.","authors":"Eric Harbour, Rosanna Farlock, David Marko, Petr Bahenský, Hermann Schwameder","doi":"10.1080/02640414.2025.2526277","DOIUrl":"10.1080/02640414.2025.2526277","url":null,"abstract":"Elite female athletes are vulnerable to respiratory limitations, and sports bra tightness may contribute to this phenomenon. Since the underband is located over the diaphragmatic ribcage, its tightness may affect ribcage mechanics, breathing muscles coordination, and fatigue. Seventeen trained junior female runners (VO2max = 53 ± 4 mL/kg/min) ran on a treadmill at personal race pace until exhaustion (range 15-30 min) in three standardised underband tightnesses. Ventilation (VE) and breathing pattern were recorded via Opto-electronic plethysmography throughout the run. Spirometry, maximum inspiratory pressure (MIP), and leg and breathing effort questionnaires were collected pre- and post-run. MIP decreased more with the tight (-9.8 ± 8.3%) than the loose underband (-1.1 ± 7.3%) (p = 0.002). With greater underband tightness, VE was increased (+8.4 ± 13.1 % tight vs. loose, p = 0.03), inspiratory capacity was repressed (4.2 ± 5.1 %, p = 0.03) and thoraco-abdominal coordination was altered with earlier abdominal breathing sequencing. Since reduced underband tightness may be advantageous for ventilation via attenuated diaphragm fatigue, sports bras might be improved with updated fitting procedures or novel garment designs.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1871-1884"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144528526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pose estimation for pickleball players' kinematic analysis through MediaPipe-based deep learning: A pilot study. 基于mediapipe深度学习的匹克球运动员运动学分析的姿态估计：初步研究。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-25 DOI: 10.1080/02640414.2025.2524283

Saeid Edriss, Cristian Romagnoli, Marco Maurizi, Lucio Caprioli, Vincenzo Bonaiuto, Giuseppe Annino

{"title":"Pose estimation for pickleball players' kinematic analysis through MediaPipe-based deep learning: A pilot study.","authors":"Saeid Edriss, Cristian Romagnoli, Marco Maurizi, Lucio Caprioli, Vincenzo Bonaiuto, Giuseppe Annino","doi":"10.1080/02640414.2025.2524283","DOIUrl":"10.1080/02640414.2025.2524283","url":null,"abstract":"Pickleball has gained popularity across diverse age groups. This sport has particular balls that require different hitting styles, like hitting dinks. This study focuses on introducing pickleball players' kinematic analysis through a MediaPipe-based deep learning (DL) tool and analyzes the dominant leg's femur angle, knee angle, and wrist motion of pickleball players during the hitting dink shots, comparing pickleball players with high-level and beginner levels. Fourteen male pickleball players (aged 46.5 ± 10.5) participated in performing a dink shot during warm-up while being recorded by a GoPro camera and analysed by the DL tool. Statistical analysis, including T-tests and One-way ANOVA, showed significant differences between athletes and non-athletes in femur angle during the dink shot (p < 0.001), where high-level athletes demonstrated more femur flexion. Knee angles did not differ significantly, but advanced athletes maintained continuous wrist motion after the ball hit (p < 0.001). The MediaPipe-based DL tool estimated joint angles and motion patterns, offering an approximate alternative to visual analysis by coaches. With the developed DL tool, the coaches and players can rapidly monitor kinematics parameters and identify improvement areas. Future studies should further investigate foot positioning and trunk rotations in different shot types to assess pickleball biomechanical behaviours.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1860-1870"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144497401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring relationships between psychological sense of community, empathy and sportspersonship. 探索群体心理、共情与运动员人格之间的关系。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2025-09-01 Epub Date: 2025-06-19 DOI: 10.1080/02640414.2025.2521594

Eric Legg, Lori A Gano-Overway, E Whitney G Moore, Aubrey Newland

{"title":"Exploring relationships between psychological sense of community, empathy and sportspersonship.","authors":"Eric Legg, Lori A Gano-Overway, E Whitney G Moore, Aubrey Newland","doi":"10.1080/02640414.2025.2521594","DOIUrl":"10.1080/02640414.2025.2521594","url":null,"abstract":"This study investigated the relationships between psychological sense of community (SoC), cognitive empathy (CE), affective empathy (AE) and sportspersonship behaviours among high school student-athletes, particularly attending to whether CE and AE mediated the relationship. Data were collected from 1,216 participants over a two-year cycle with a planned missing data design being used in year 2 to reduce participant burden and maximize data collection quality. Participants completed self-report surveys measuring the variables of interest. No differences emerged between year 1 and year 2 data. Employing structural equation modelling to analyse the data across the 2 years, a partially mediated model emerged. Results revealed SoC was positively associated with CE, AE, respect for rules and officials, commitment to sport participation and respect for social conventions while being negatively related to the negative approach towards practice of sport. CE and AE mediated the relationship between SoC and the positive sportspersonship behaviours. The study contributes to our understanding of how planned missing data designs can be used in research and provides insights into the positive role the SoC may play on sportspersonship behaviours directly and indirectly through CE and AE. Practically, coaches may want to consider how they develop SoC on their sport teams.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1845-1859"},"PeriodicalIF":2.5,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144333403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0