Journal of Sports Sciences最新文献_第2页

Walking activity and depressive symptoms amongst Mexican American older adults aged 80 years and older. 80岁及以上墨西哥裔美国老年人的步行活动与抑郁症状

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2026-02-23 DOI: 10.1080/02640414.2026.2633812

Kevin Chen, Soham Al Snih

{"title":"Walking activity and depressive symptoms amongst Mexican American older adults aged 80 years and older.","authors":"Kevin Chen, Soham Al Snih","doi":"10.1080/02640414.2026.2633812","DOIUrl":"10.1080/02640414.2026.2633812","url":null,"abstract":"Physical activity is protective for the development of depressive symptoms in older adults. We examined the relationship between walking activity and depressive symptoms amongst Mexican American older adults without a history of depressive symptoms at baseline over a 9-year period. We hypothesize that those engaging in walking activity are at lower risk of developing depressive symptoms over time than those who do not. Participants (N = 836) were Mexican Americans aged 80 years and older in the Southwestern United States from the Hispanic Established Population for the Epidemiologic Study of the Elderly (2007/05-2016). Depressive symptoms were assessed with the Center for Epidemiologic Studies Depression Scale (CES-D ≥ 16). Participants were grouped into non-walkers (n = 535), walked <150 min/week (n = 123), and walked ≥150 min/week (n = 178). Generalized Estimating Equation models estimated the odds ratio (OR) and 95% Confidence Interval (CI) of depressive symptoms as a function of walking activity status, controlling for all covariates. Participants walking ≥150 min/week had lower odds (OR = 0.53, 95% CI = 0.30-0.93) of developing depressive symptoms over time than non-walkers. Compared to non-walkers, those walking <150 min/week had a non-significant relationship of developing depressive symptoms (OR = 0.81, 095% CI = 0.51-1.31) over time. Mexican American older adults engaged in walking activity have reduced risk of developing depressive symptoms.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1140-1148"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13035210/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147271325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monocular markerless position tracking of elite amateur boxing fighters in real combat situation. 精英业余拳击运动员在实战情境下的单目无标记位置跟踪。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2025-06-10 DOI: 10.1080/02640414.2025.2510774

Alexandre Schortgen, Thibault Goyallon, Guillaume Saulière, Antoine Muller, Lionel Revéret

{"title":"Monocular markerless position tracking of elite amateur boxing fighters in real combat situation.","authors":"Alexandre Schortgen, Thibault Goyallon, Guillaume Saulière, Antoine Muller, Lionel Revéret","doi":"10.1080/02640414.2025.2510774","DOIUrl":"10.1080/02640414.2025.2510774","url":null,"abstract":"Markerless video analysis represents an opportunity for conducting efficient in-situ motion analysis of athletes during competitions. From monocular video data, we propose a robust end-to-end method to automatically capture the 2D trajectory of athletes' position on planar ground, even in highly occluded contexts. A tracking-by-detection algorithm is first applied on a short sequence to build a specific contextual dataset ('self-supervision'). These data are subsequently used to train a specific person detector. Afterwards, body anatomical features in image coordinates are identified using human pose estimator. Athletes position is extracted as the midpoint between the feet and converted to metric units through homography. The accuracy of our monocular algorithm was evaluated by comparison with a position trajectories calculated from markerless reconstruction of 3D poses using 11 accurately synchronized and calibrated cameras as reference. The average error was 0.3 m over about 130,000 frames at 50 fps. The trajectories of the monocular method and the multiple views reference show an average correlation above 0.9. The robustness of the monocular method was tested in real competition of boxing combats for 18 rounds involving 22 elite fighters. These results open perspectives to provide performance indicators such as ring generalship to the coaching staff with minimal setup.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1319-1333"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144266482","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

Using markerless motion capture to explore changes in tackle kinematics and load-based tackling technique proficiency. 使用无标记动作捕捉来探索铲球运动学和基于负载的铲球技术熟练程度的变化。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2025-10-27 DOI: 10.1080/02640414.2025.2577028

Lara Paul, Zubair Martins, Demi Davidow, Gordon Rennie, Amir Patel, Ben Jones, Sarah Whitehead, Sharief Hendricks

{"title":"Using markerless motion capture to explore changes in tackle kinematics and load-based tackling technique proficiency.","authors":"Lara Paul, Zubair Martins, Demi Davidow, Gordon Rennie, Amir Patel, Ben Jones, Sarah Whitehead, Sharief Hendricks","doi":"10.1080/02640414.2025.2577028","DOIUrl":"10.1080/02640414.2025.2577028","url":null,"abstract":"The purpose of this study is to explore how PlayerLoadTM and tackle kinematics change during a simulated tackle in relation to tackle technique proficiency. Twenty amateur male rugby union players performed 12 tackles on a tackle contact simulator while wearing a microtechnology device. Each tackle was video-recorded and analysed using tackler proficiency criteria. Based on the criteria tackles were split into three categories: lower (≤7 AU), medium (8 AU) and higher scoring tackles (≥9AU). Markerless motion capture was used to derive kinematic variables for each tackle. Kinematic data and PlayerLoadTM variables were analysed between the three different categories. Power of the shoulder at contact in the higher scoring tackles (27.8 [95%Cl: 11.36-44.3]kW) was significantly higher than in the lower scoring tackles (7.9 [5.3-10.5]kW). Force of the shoulder at contact was higher in the lower technique scoring tackles (3.6 [2.6-4.5]kN) than in higher scoring tackles (-2.1 [-0.8-5.1]kN), but in the opposite direction to where the tackle is made. Technically proficient tackles are more powerful because players are applying their force correctly at the point of contact. Despite the higher technical proficiency group being more powerful, the external loads experienced by the player may be similar for all tackles.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1361-1373"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145372771","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

Evaluation of a markerless motion capture system for measuring mechanical work during tennis strokes. 一种用于测量网球击球过程中机械功的无标记运动捕捉系统的评估。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2025-09-04 DOI: 10.1080/02640414.2025.2555096

Julie Emmerson, Laurie Needham, Sean Williams, Steffi Colyer

{"title":"Evaluation of a markerless motion capture system for measuring mechanical work during tennis strokes.","authors":"Julie Emmerson, Laurie Needham, Sean Williams, Steffi Colyer","doi":"10.1080/02640414.2025.2555096","DOIUrl":"10.1080/02640414.2025.2555096","url":null,"abstract":"This study evaluated the agreement between markerless motion capture and criterion methods for estimating mechanical work (external and internal) performed during tennis strokes. Sixteen tennis players performed 10 serve, forehand and backhand movements whilst motion data were captured concurrently with a custom 3D markerless system (utilising open-source pose estimation; HRNet and OpenPose) and two criterion methods: marker-based motion capture and ground reaction forces. Centre of mass kinetic and potential energy were calculated and used to compute external mechanical work from all methods, whilst segment kinetic energies were calculated and used to compute internal mechanical work from the kinematic approaches only. Small biases (≤4%) and moderate limits of agreement (LoA; ±6-10%) from Bland-Altman analyses indicated strong agreement with the criterion systems for external work across multiple strokes. Although small biases of 4-7% (HRNet) and 1-2% (OpenPose) were observed for internal work, high-frequency artefacts in markerless kinematics (particularly evident for OpenPose) led to high random errors (LoA of ± 8-13% [HRNet] and ± 12-21% [OpenPose]) and large inter-individual differences. Our markerless approach shows promise for measuring external mechanical work during tennis and has the potential to be implemented in the field as a non-invasive tool for on-court workload monitoring.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1348-1360"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145000790","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

Assessing the accuracy of in-stadium and portable multi-camera markerless motion capture for baseball pitching kinematics and kinetics. 评估棒球投球运动学和动力学的场内和便携式多相机无标记运动捕捉的准确性。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2025-11-26 DOI: 10.1080/02640414.2025.2595411

Arnel L Aguinaldo, Tyler Cardinale, D Taylor La Salle, Rafael F Escamilla, James H Buffi

{"title":"Assessing the accuracy of in-stadium and portable multi-camera markerless motion capture for baseball pitching kinematics and kinetics.","authors":"Arnel L Aguinaldo, Tyler Cardinale, D Taylor La Salle, Rafael F Escamilla, James H Buffi","doi":"10.1080/02640414.2025.2595411","DOIUrl":"10.1080/02640414.2025.2595411","url":null,"abstract":"Markerless (ML) motion capture has emerged as a viable option to marker-based (MB) motion capture in estimating movement biomechanics, but limited data exists on the accuracy of ML systems during high-speed throwing. This study evaluated the accuracy and reliability of an in-stadium (Hawk-Eye) and a portable (Theia3D) ML motion-capture system in quantifying baseball pitching kinematics and kinetics relative to an MB reference. Eighteen collegiate pitchers were simultaneously recorded using all three systems. Mean per-joint position error (MPJPE), statistical parametric mapping (SPM), root mean square error (RMSE), Bland-Altman analysis, and concordance correlation coefficients (CCC) were used to assess agreement. Both ML systems demonstrated measurable discrepancies across variables, with MPJPE values of 56.6 ± 9.4 mm (Hawk-Eye) and 52.0 ± 12.3 mm (Theia3D). Stride length exhibited the strongest agreement with MB in both systems (CCC > 0.85), whereas shoulder rotational variables showed greater variability. Error magnitudes in joint positions and kinematic waveforms were comparable to those reported for other ML systems during dynamic movements. These results highlight the influence of system configuration, camera deployment, and pose-estimation models on biomechanical accuracy. Overall, both configurations showed potential for estimating pitching biomechanics, underscoring the trade-offs between criterion and ecological validity in markerless motion capture.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1374-1388"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145604810","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

Relationship between body mass index, insulin resistance, and metabolic syndrome in children: Effect of vigorous physical activity. 儿童体重指数、胰岛素抵抗和代谢综合征的关系：剧烈运动的影响

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2026-02-24 DOI: 10.1080/02640414.2026.2637039

Seamon Kang, Qiu Xiaoming, Hyunsik Kang

{"title":"Relationship between body mass index, insulin resistance, and metabolic syndrome in children: Effect of vigorous physical activity.","authors":"Seamon Kang, Qiu Xiaoming, Hyunsik Kang","doi":"10.1080/02640414.2026.2637039","DOIUrl":"10.1080/02640414.2026.2637039","url":null,"abstract":"The association between physical activity (PA), obesity, insulin resistance (IR), and metabolic syndrome (MetS) in pediatric populations remains unclear. This cross-sectional study investigated 1) whether IR mediates the relationship between obesity and MetS in Korean children, and 2) whether PA intensity modulates the effect of obesity on IR. Six hundred and thirteen Korean children (320 boys/293 girls) aged 9-12 years participated in this study. Mediation analysis showed that body mass index (BMI) z-scores influence MetS directly in boys (β = 2.151, SE = .781, p = .040) and girls (β = 7.531, SE = 1.929, p = .040). A 5000 bootstrapping for an indirect effect confirmed that the homeostatic model assessment for IR (HOMA-IR) mediates the relationship between BMI z-scores and MetS in both boys (β = .544, standard error, SE = .325, 95% confidence interval, 95% CI [0.121, 1.399]) and girls (β = .865, SE = 3.748, 95% CI [0.459, 2.446]). Finally, our moderated-mediation analysis showed a significant interaction effect between BMI z-scores and vigorous PA on HOMA-IR (β = .002, SE = .001, p = .023) in boys only. This indicates that vigorous PA influences the relationship between BMI z-scores and HOMA-IR in boys.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1149-1157"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147284113","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

Unlocking the potential of video-based markerless motion analysis to study world-class sporting performance. 释放基于视频的无标记运动分析的潜力，以研究世界级的运动表现。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2025-10-27 DOI: 10.1080/02640414.2025.2576412

Desmond Boey, Olivier Girard, Marcus Lee, Bruce Elliott, Machar Reid

{"title":"Unlocking the potential of video-based markerless motion analysis to study world-class sporting performance.","authors":"Desmond Boey, Olivier Girard, Marcus Lee, Bruce Elliott, Machar Reid","doi":"10.1080/02640414.2025.2576412","DOIUrl":"10.1080/02640414.2025.2576412","url":null,"abstract":"The ability to access and assess technique of world-class athletes in-competition has long eluded sport biomechanists due to the constraints of 3-dimensional marker-based motion capture systems. Encouragingly, the advent of video-based markerless motion analysis offers the opportunity for unobtrusive capture of sporting performances in-competition. This narrative review explores the progression of markerless systems from laboratory-like to in-competition analysis. It first explores the accuracy of markerless motion analysis for joint kinematics in dynamic and sporting movements. Next, its utility in competition is explored with ways to validate these in-competition set-ups. Existing in-competition set-ups offer a viable foundation for skeletal tracking but still requires rigorous validation. Tennis is proposed as an example where the current in-competition infrastructure may support high-fidelity motion analysis. On top of the advanced hardware (i.e. camera configurations) that has been heavily invested in, software optimization methods proposed in computer vision research (i.e. enhancing data processing efficiency, expanding and refining training datasets with anatomically-accurate labelling and sport-specific data, and increasing the quantity and types of keypoints detected), can potentially improve its accuracy for in-competition analysis. Ultimately, a markerless system rigorously validated under real-world constraints can bridge the gap between accessing and assessing world-class sporting performances for sport biomechanics.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1261-1274"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145372712","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

Naturalistic verbal and non-verbal encouragement in athletic performance assessments: A mixed-methods study. 运动成绩评估中的自然语言和非语言鼓励：一项混合方法研究。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2026-02-21 DOI: 10.1080/02640414.2026.2632508

Edda van Meurs, Margaret Nieto, Bernd Strauss, Sebastian Harenberg

{"title":"Naturalistic verbal and non-verbal encouragement in athletic performance assessments: A mixed-methods study.","authors":"Edda van Meurs, Margaret Nieto, Bernd Strauss, Sebastian Harenberg","doi":"10.1080/02640414.2026.2632508","DOIUrl":"10.1080/02640414.2026.2632508","url":null,"abstract":"Social influence through verbal encouragement (VE) or non-verbal encouragement (NVE) aims to support athletes by mobilising resources. Its effectiveness has already been studied in sports by comparing performances with or without VE to investigate the performance-enhancing effect. However, these studies use standardised formulations, given at regular intervals by experimenters who are unknown to the participants, reducing the external validity. This may result in an underestimation of the actual effect. To date, no empirical evidence exists to characterise VE and NVE. The present study analyses the quantitative and qualitative characteristics of VE and NVE. We hypothesised that both would become more frequent the more demanding the task becomes. We video-recorded 39 Canadian hockey student-athletes (49% female, Mage = 20.97, SDage = 1.91). VE and NVE of the encouraging athletes on the sideline per second were coded, transcribed, and the content explored using deductive-inductive thematic analysis. We found that VE and NVE increased over time and that male and female athletes encouraged differently. Statements could be classified as informational, appraisal or tangible support. The results of the analysis can be used as a framework for naturalistic encouragement in future operationalisations. Moreover, we highlight the interpersonal differences in encouragement behaviour, specifically between men and women.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1113-1126"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146258458","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

Redefining roles in wheelchair basketball: A data driven approach to characterising playing positions. 重新定义轮椅篮球中的角色：一个数据驱动的方法来表征打球位置。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2026-03-02 DOI: 10.1080/02640414.2026.2637047

Penny Wilde, Edgar Santos-Fernandez, Peter Peeling, Luke Mitchell, Simon Denman

{"title":"Redefining roles in wheelchair basketball: A data driven approach to characterising playing positions.","authors":"Penny Wilde, Edgar Santos-Fernandez, Peter Peeling, Luke Mitchell, Simon Denman","doi":"10.1080/02640414.2026.2637047","DOIUrl":"10.1080/02640414.2026.2637047","url":null,"abstract":"A key facet of wheelchair basketball is the sport classification system, where players are assigned scores from 1.0 to 4.5 (where lower scores indicate greater activity limitation for wheelchair basketball related tasks), and on-court lineups cannot exceed a total of 14 sport classification points. In wheelchair basketball, the specific on-court roles of players are poorly understood outside of labelling players into sport classification categories or likening them to traditional running basketball positions. This study presents a data-driven approach to characterising playing positions in elite, male wheelchair basketball using Gaussian Mixture Model analysis. Box score metrics describing players on-court actions from 12 men's international tournaments between 2019-2024 were analysed, totalling 5265 match statistics from 342 players across 304 matches. The model identified six novel and diverse player roles. These ranged from primary playmaker and dynamic impact roles that higher classification players (3.5-4.5) tended towards, to off-ball, defensive orientated roles which lower classification players (1.0-1.5) were frequently observed in. This research provides a novel framework for understanding player roles that accounts for the sport's unique characteristics. This has significant implications for refining player selection in response to lineup needs, informing player recruitment for balanced team building and improving targeted player development pathways.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1228-1238"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147344635","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

Lower limb movement asymmetry exists during volleyball stop-jump landing: Insights from markerless motion capture. 下肢运动不对称存在于排球停跳落地：来自无标记动作捕捉的见解。

IF 2.5 2区医学

Journal of Sports Sciences Pub Date : 2026-05-01 Epub Date: 2025-04-13 DOI: 10.1080/02640414.2025.2490883

Tom Höltke, Riemer J K Vegter, Michel S Brink, Ina Janssen

{"title":"Lower limb movement asymmetry exists during volleyball stop-jump landing: Insights from markerless motion capture.","authors":"Tom Höltke, Riemer J K Vegter, Michel S Brink, Ina Janssen","doi":"10.1080/02640414.2025.2490883","DOIUrl":"10.1080/02640414.2025.2490883","url":null,"abstract":"Patellar tendinopathy is a highly prevalent injury associated with high knee angular accelerations. However, collecting kinematic data on the volleyball court remains challenging. This study investigated landing kinematics between dominant and non-dominant lower limbs during stop-jumps on the volleyball court and analysed landing variables to identify biomechanical patterns associated with high knee angular accelerations. Landing kinematics were quantified using 3D markerless motion capture (OpenCap) with two cameras. Fourteen male and 5 female elite volleyball players performed 10 stop-jump landings while approaching the net to spike a ball over the net. Asymmetry was found with the dominant limb landing in greater plantarflexion and hip flexion but less knee flexion. The dominant limb exhibited higher knee angular velocities (mean ± standard deviation: dominant = 274 ± 62°/s, non-dominant = 169 ± 84°/s; p < 0.001) and accelerations (dominant = 3924 ± 2221°/s2, non-dominant = 1441 ± 4278°/s2; p = 0.032), suggesting greater biomechanical load. High knee accelerations were significantly correlated with limited knee and hip flexion in the dominant limb, closer foot position, greater trunk flexion at non-dominant limb touchdown, and longer contact time with the non-dominant limb (Pearson's correlation coefficient; |0.55| ≤ r ≤ |0.79|, p < 0.018). OpenCap provided valuable insights into volleyball stop-jump kinematics. Therefore, markerless motion capture can provide coaches and scientists with a deeper understanding of landing performance and related injury mechanisms.","PeriodicalId":17066,"journal":{"name":"Journal of Sports Sciences","volume":" ","pages":"1296-1306"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143988500","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