Sports Biomechanics最新文献_第2页

Training alters joint power distributions during running in National Football League Draft Preparation Players. 训练改变了国家橄榄球联盟选秀准备球员跑步时的联合力量分配。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-02 DOI: 10.1080/14763141.2025.2498338

G Monique Mokha, Marissa Bonsangue, ToniAnn Brezina, Jacob Haberer

{"title":"Training alters joint power distributions during running in National Football League Draft Preparation Players.","authors":"G Monique Mokha, Marissa Bonsangue, ToniAnn Brezina, Jacob Haberer","doi":"10.1080/14763141.2025.2498338","DOIUrl":"https://doi.org/10.1080/14763141.2025.2498338","url":null,"abstract":"The aim of this study was to compare joint-specific contributions to total lower limb joint power during a speed run in American style football players before and after a 6-week National Football League (NFL) draft preparation camp. Fifty-two players performed one 5-second treadmill run at 5.5-6.5 m/s before and after camp. Speed was consistent between tests. Bilateral hip, knee, and ankle power generation (positive) and absorption (negative) were calculated from kinematics and kinetics using inverse dynamics. Negative total limb power decreased for both limbs, significantly for the left (Z = -2.113, p = .035, r = .30) due to significant decreases in negative ankle power bilaterally (left, Z = -1.967, p = .049, r = .27; right, Z = -2.623, p = .009, r = .36). The contribution of negative left hip power significantly increased (Z = -2.398, p = .016, r = .31). While no other significant changes in positive or negative joint-specific magnitudes or contributions occurred, there were general distal-to-proximal shifts in joint power contributions. Players appear to have adopted more energy efficient running through moderate joint-specific mechanistic training adaptations such as a reduction in ankle power absorption.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-18"},"PeriodicalIF":2.0,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144042790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 biomechanical study of judo uchimata: a comparison of judokas with different skill levels. 内道的生物力学研究：不同技术水平柔道运动员的比较。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-04-15 DOI: 10.1080/14763141.2025.2474515

Kazuto Hamaguchi, Lingjun Liu, Matsuhisa Shiokawa, Tatsuya Deguchi

{"title":"A biomechanical study of judo uchimata: a comparison of judokas with different skill levels.","authors":"Kazuto Hamaguchi, Lingjun Liu, Matsuhisa Shiokawa, Tatsuya Deguchi","doi":"10.1080/14763141.2025.2474515","DOIUrl":"https://doi.org/10.1080/14763141.2025.2474515","url":null,"abstract":"This study aimed to elucidate the biomechanical factors contributing to effective uchimata throwing by comparing highly skilled and less skilled judokas. Ten highly skilled and 10 less skilled judokas performed uchimata, with movement data recorded using a Mac3D motion analysis system (250 hz). The peak values of the body centre of mass velocity in the anterior-posterior and vertical directions were significantly greater in highly skilled judokas compared to their less skilled counterparts. Furthermore, the peak angular velocity of the hips, shoulders and arms, as well as the peak angular momentum of the technique recipient (uke), were significantly greater in highly skilled judokas than in less skilled ones. This suggests that judokas with advanced skills may execute throws more efficiently during throwing movements. Furthermore, a larger forward propulsion during the turning phase may be crucial in generating angular velocity in the hips, shoulders and arms during the throwing phase. Judo coaches should be aware of the accelerated body rotation during throwing that can be achieved by increasing the whole-body forward velocity. This insight can guide in enhancing the training protocol design when teaching uchimata and assist judokas in mastering the technique more efficiently.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144047219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Novel possibilities of acceleration time series for performance and acute fatigue assessment in uphill trail running. 加速时间序列在上坡跑中表现和急性疲劳评估的新可能性。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-04-10 DOI: 10.1080/14763141.2025.2486088

Lluc Montull, Sergi Matas, Albert Canton, Esther Vives, Aleix Solé, Alex Borrallo, Assumpta Ensenyat

{"title":"Novel possibilities of acceleration time series for performance and acute fatigue assessment in uphill trail running.","authors":"Lluc Montull, Sergi Matas, Albert Canton, Esther Vives, Aleix Solé, Alex Borrallo, Assumpta Ensenyat","doi":"10.1080/14763141.2025.2486088","DOIUrl":"https://doi.org/10.1080/14763141.2025.2486088","url":null,"abstract":"The potential for assessing performance and acute fatigue in uphill trail running (UTR) through acceleration time series remains underexplored. For this purpose, time-variability of body acceleration and covariation among limb acceleration were studied in UTR. Twenty competitive and young trail runners participated in a simulation UTR test covering a distance of 4758 meters, with a total elevation gain of 575 meters and an average slope of 13.6%. Four sections with clear slope differences were identified. Detrended Fluctuation Analysis of upper back acceleration and Principal Component Analysis among wrists and ankle acceleration were performed for the whole test and for each section.The outcomes were correlated with performance and standardized effect size was used to compare sections. The main findings suggest that (a) runners with higher performance showed less persistence in body acceleration fluctuations and greater interlimb diversity, and (b) the steepest parts, particularly the final and effortful section, showed increased persistence in body acceleration and some runners lost interlimb covariation.In conclusion, time-variability and coordination analyses of acceleration time series seem to be sensitive to performance and acute fatigue in UTR, which opens further possibilities for providing more integrative, dynamic, and practical assessment tools.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-21"},"PeriodicalIF":2.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143993617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Characterising biomechanical and situational aspects of high magnitude subconcussive impacts in Canadian collegiate football. 加拿大大学橄榄球队高强度次撞击的生物力学和情况特征。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-04-07 DOI: 10.1080/14763141.2025.2471804

Kristen L Lacelle, Mario D Bassi, Allen A Champagne, Boris R G Baker, Emile P Peponoulas, Kaden T Shearer, Blaire T Magee, Nicole S Coverdale, Douglas J Cook

{"title":"Characterising biomechanical and situational aspects of high magnitude subconcussive impacts in Canadian collegiate football.","authors":"Kristen L Lacelle, Mario D Bassi, Allen A Champagne, Boris R G Baker, Emile P Peponoulas, Kaden T Shearer, Blaire T Magee, Nicole S Coverdale, Douglas J Cook","doi":"10.1080/14763141.2025.2471804","DOIUrl":"https://doi.org/10.1080/14763141.2025.2471804","url":null,"abstract":"The objective of this study was to characterise high magnitude subconcussive impacts in Canadian football to identify injurious relationships between player/game-based characteristics, impact magnitude, and frequency. Eighty-one male university-level football players were equipped with helmet accelerometers to capture peak linear acceleration (PLA), impact frequency, and helmet impact location. Impacts with PLA ≥ 60 g were included in this analysis. Video footage from 15 games over three seasons was analysed to characterise aspects of play including play type, position, closing distance, tackling versus blocking, and impact. Impacts occurring at the left outside boundary of the field resulted in significantly higher linear accelerations. Impacts with a closing distance of ≥10 yards resulted in higher PLA compared to <10 yards and occurred most frequently in run plays. Helmet-to-body impacts generated significantly higher PLA compared to helmet-to-helmet, though helmet-to-helmet occurred more often. Players being tackled sustained significantly higher PLAs than those blocking. The results of this work suggest that the left outside boundary is an area of importance for spotters looking to identify high-risk impacts. Further, rules regarding offensive backfield running starts could be adjusted to decrease the risk of impact after a larger closing distance.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-21"},"PeriodicalIF":2.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143796902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 maximal jumping height in pole vault and the approach-run velocity evaluated by digitising method or laser method. 用数字化法和激光法评价了撑杆跳高最大起跳高度与助跑速度的关系。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-04-04 DOI: 10.1080/14763141.2025.2486095

F Kobayashi, A Noro, S Hatakeyama, Y Shinohara, M Otsuka

{"title":"Relationship between maximal jumping height in pole vault and the approach-run velocity evaluated by digitising method or laser method.","authors":"F Kobayashi, A Noro, S Hatakeyama, Y Shinohara, M Otsuka","doi":"10.1080/14763141.2025.2486095","DOIUrl":"10.1080/14763141.2025.2486095","url":null,"abstract":"The first objective was to validate various approach-run velocities obtained using body-only method (digitising only the athlete's body) or laser method (using a laser displacement metre) against the whole-system method (digitising both the athlete's body and pole) during pole vaulting. The second objective of this study was to clarify the relationship between the approach-run velocity obtained by different three methods and the maximal height of the athlete's centre of mass (COM) during the clearance. Eighteen male athletes performed 96 pole-vaulting attempts in outdoor competitions. Bland-Altman plots indicated that only the peak approach-run velocity obtained by the body-only method had negligible bias, while other parameters obtained by body-only digitising and laser methods contained several errors. Since such bias could cause problems, using conventional digitising and laser methods requires careful handling. The association between maximal COM height during the clearance and peak approach-run velocity was extremely large for all three methods. In contrast, although the relationship between the maximal COM height and the decrease in approach-run velocity was large for both digitising methods, it was weakened for laser method. Consequently, based on the approach-run velocity parameters, different calculation methods for approach-run velocity parameters resulted in varying relationships with jumping performance.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143780226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 head kinematics experienced during common skill progression pathways in Women's Artistic Gymnastics. 评价在女子艺术体操常见的技术进步路径中头部的运动学经验。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-03-26 DOI: 10.1080/14763141.2025.2481154

N Stewart Pritchard, Kambrie M Brandt, Alexandra G Peluso, David W Kruse, Elspeth Hart, Heather P Carr, Garrett S Bullock, Christopher M Miles, Justin B Moore, Joel D Stitzel, Jillian E Urban

{"title":"Evaluation of head kinematics experienced during common skill progression pathways in Women's Artistic Gymnastics.","authors":"N Stewart Pritchard, Kambrie M Brandt, Alexandra G Peluso, David W Kruse, Elspeth Hart, Heather P Carr, Garrett S Bullock, Christopher M Miles, Justin B Moore, Joel D Stitzel, Jillian E Urban","doi":"10.1080/14763141.2025.2481154","DOIUrl":"https://doi.org/10.1080/14763141.2025.2481154","url":null,"abstract":"This study aimed to evaluate head kinematics experienced during skill progression pathways in Women's Artistic Gymnastics to inform post-concussion return to gymnastics protocols. A return to gymnastics framework, consisting of seven skill progression pathways, was developed. Twelve gymnasts were instrumented with mouthpiece sensors and performed two trials of each skill, if able. Sensors recorded data at 100 Hz and skill segments were extracted using time-synchronised video. Peak resultant linear (PLA) and rotational acceleration (PRA), rotational velocity change index (ΔRV) and peak resultant rotational velocity (PRV) of 1 Hz low pass filtered data were computed from skills. A mixed effects model evaluated differences in kinematic metrics across skills within pathways while adjusting for random effects of the participant. Stepwise increases in kinematic metrics occurred along backward and forward tumbling (floor) pathways but did not occur in other pathways. For instance, gymnasts experienced greater PLA and PRV during clear hip and back hip circle compared to giant. Moreover, skills performed early along respective pathways (e.g, Yurchenko timer (to back), Tsukahara timer (to back), handstand forward roll) were among the skills with the greatest PRA and ΔRV. Head kinematics associated with skill performance should be considered when developing return to gymnastics protocols.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-21"},"PeriodicalIF":2.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143711901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The effect of sex, skill level and a defender on cutting kinematics in soccer players. 性别、技术水平和防守队员对足球运动员切球运动学的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-03-25 DOI: 10.1080/14763141.2025.2481496

Karen Chen, Harry Brown, Sophie Guilmette, Moreno Morelli, Anouk Lamontagne, Shawn M Robbins

{"title":"The effect of sex, skill level and a defender on cutting kinematics in soccer players.","authors":"Karen Chen, Harry Brown, Sophie Guilmette, Moreno Morelli, Anouk Lamontagne, Shawn M Robbins","doi":"10.1080/14763141.2025.2481496","DOIUrl":"10.1080/14763141.2025.2481496","url":null,"abstract":"Cutting patterns may be influenced by task complexity and player attributes, ultimately affecting injury risks. This study examines the impact of skill level, sex, and defender conditions on joint kinematics during unanticipated cutting in soccer players. Kinematic data were captured using a three-dimensional motion capture system for 14 competitive and 14 recreational players performing unanticipated sidesteps (45 ± 10 degrees) under three conditions: no obstacle (NO), static-defender obstacle (SO) and dynamic-defender obstacle (DO). Principal component (PC) analysis and hierarchical linear models examined joint kinematics against sex, skill and defender conditions. For the first component of PC, skill effects revealed greater ankle dorsiflexion angles throughout cutting in competitive players (p = 0.01) than recreational players. DO trials showed lower hip flexion (p = 0.001) and ankle dorsiflexion angles (p = 0.01) than NO. SO trials showed greater hip adduction (p < 0.001) and knee abduction angles (p = 0.04), but lower ankle dorsiflexion angles (p < 0.001) than NO. For PC2, SO trials showed greater hip flexion excursions (p = 0.005) than NO. No sex effects were found. Clearance (participant's distance to the defender) was examined using a three-way analysis of covariance. Greater distances were found in DO by 0.59 m than SO. Differences in cutting patterns highlight potential adaptations to varying defender pressures, providing insights for coaching and prevention programmes.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-18"},"PeriodicalIF":2.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143701865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Wearable-based estimation of continuous 3D knee moments during running using a convolutional neural network. 基于可穿戴设备的跑步过程中连续三维膝关节力矩的卷积神经网络估计。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-03-24 DOI: 10.1080/14763141.2025.2481164

Lucas Höschler, Christina Halmich, Christoph Schranz, Julian Fritz, Saša Čigoja, Martin Ullrich, Anne D Koelewijn, Hermann Schwameder

{"title":"Wearable-based estimation of continuous 3D knee moments during running using a convolutional neural network.","authors":"Lucas Höschler, Christina Halmich, Christoph Schranz, Julian Fritz, Saša Čigoja, Martin Ullrich, Anne D Koelewijn, Hermann Schwameder","doi":"10.1080/14763141.2025.2481164","DOIUrl":"https://doi.org/10.1080/14763141.2025.2481164","url":null,"abstract":"This study aimed to develop and validate a machine learning method to estimate continuous 3D knee moments during running from wearable sensor data. Reference knee moments were calculated from 19 recreational runners during treadmill running at varying slopes (0 ± 5 % incline), speeds (self-selected ± 1 km/h) and in 3 types of footwear. A convolutional neural network was trained on data from 7 inertial measuring units (feet, shanks, thighs, sacrum) and a pair of pressure insoles. We assessed performance over continuous time windows (CONT) and during stance phases (PHSS) by intraclass-correlation (ICC), normalised root mean squared error (nRMSE), and statistical parametric mapping. The agreement levels in the sagittal plane were good to excellent (ICC: 0.84-0.98), with low errors (nRMSE: 0.05-0.11). However, accuracy was lower for non-sagittal estimations (frontal ICC: 0.19-0.90, nRMSE: 0.08-0.23; transverse ICC: 0.72-0.94, nRMSE: 0.07-0.17). Accuracy decreased across all planes during PHSS. The proposed approach yields similar or better accuracy compared to previous work while requiring less preprocessing. It provides a viable method for wearable-based assessment of running kinetics in near real-time. Additional data and methods to address inter-individual variability could improve its precision in assessing frontal plane injury risk factors.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-19"},"PeriodicalIF":2.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143693715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Running stiffness and spatiotemporal parameters are similar between non-runners and runners with different experience levels. 不同经验水平的跑步者和非跑步者的跑步刚度和时空参数相似。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-03-24 DOI: 10.1080/14763141.2025.2480094

Rodrigo Rabello, Gauri A Desai, Chiarella Sforza, Allison H Gruber

{"title":"Running stiffness and spatiotemporal parameters are similar between non-runners and runners with different experience levels.","authors":"Rodrigo Rabello, Gauri A Desai, Chiarella Sforza, Allison H Gruber","doi":"10.1080/14763141.2025.2480094","DOIUrl":"https://doi.org/10.1080/14763141.2025.2480094","url":null,"abstract":"Spatiotemporal parameters and leg and joint stiffness are variables that represent the fundamental dynamics of running. Therefore, these variables may effectively differentiate between less-experienced and more-experienced runners' gait, possibly addressing differing injury rates between populations. We compared stiffness and spatiotemporal parameters between runners with different experience levels, including a group with no previous running experience. Healthy physically active participants (22.1 ± 3.6y) were divided into three groups, according to experience: experienced (running >1-year, 14-48 km/week; n = 23, 9F), novice (running <1-year, 5-21 km/week; n = 15, 4F) and non-runners (no running for the past 5 years; n = 17, 7F). Three-dimensional motion capture and force plates measured gait mechanics during overground running at 3.35 m·s-1. Knee, ankle and three-dimensional leg stiffness, contact time, flight time and step length were compared between groups using independent-measures ANCOVA (covariate = sex). No biomechanical variable was significantly different between the groups (leg: p = 0.652, Hedges' g = 0.09-0.17; ankle: p = 0.439, g = 0.07-0.19; knee: p = 0.153, g = 0.13-0.29; contact time: p = 0.592, g = 0.06-0.24; flight time: p = 0.513, g = 0.03-0.40; step length: p = 0.107, g = 0.26-0.61). Stiffness and spatiotemporal parameters were not different between runners with greater than 1-year of experience when compared to runners with less than 1-year experience and non-runners. Therefore, running gait may not differentially affect injury rates between experience levels.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-15"},"PeriodicalIF":2.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143693714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

The association of agonist muscle fascicle length and antagonist muscle flexibility on power output during human knee extension tasks. 激动剂肌束长度和拮抗剂肌柔韧性对人膝关节伸展任务中力量输出的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-03-10 DOI: 10.1080/14763141.2025.2474516

Koki Sasabe, Daichi Nishiumi, Daisuke Takeuchi, Kotaro Kamada, Norikazu Hirose

{"title":"The association of agonist muscle fascicle length and antagonist muscle flexibility on power output during human knee extension tasks.","authors":"Koki Sasabe, Daichi Nishiumi, Daisuke Takeuchi, Kotaro Kamada, Norikazu Hirose","doi":"10.1080/14763141.2025.2474516","DOIUrl":"https://doi.org/10.1080/14763141.2025.2474516","url":null,"abstract":"Recent studies have reported that muscle power can be improved through stretching. However, the mechanisms underlying the power enhancement induced by stretching are not yet well understood. This study aimed to clarify the association of muscle fascicle length and antagonist muscle flexibility on muscle power output and velocity variables. Fascicle length and muscle thickness, pennation angle of vastus lateralis, knee flexor stiffness, and range of motion (ROM) were measured in American football players. Moreover, knee extension torque measurements were taken at five angular velocities (60 deg·s-1 - 300 deg·s-1), and theoretical maximum power (Pmax), maximum force (F0), and maximum angular velocity (V0) were calculated. Pearson's product-moment or Spearman's rank correlation coefficients were calculated for each variable. ROM showed a significant moderate positive correlation with Pmax. This suggests that the flexibility of antagonist muscles may influence the power output of agonist muscles. However, although muscle thickness showed a moderate correlation with F0, V0 did not significantly correlate with any of the variables. This finding suggests that other factors, such as rapid recruitment of motor units and muscle fibre composition, may play a more substantial role in torque at very high angular velocities than muscle morphology and mechanical properties.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-12"},"PeriodicalIF":2.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143587805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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