Sports Biomechanics最新文献

A comparison of running biomechanics on track, asphalt, grass, and treadmill using wearable sensors. 使用可穿戴传感器在跑道、沥青、草地和跑步机上跑步的生物力学比较。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-28 DOI: 10.1080/14763141.2025.2511766

Griffin R Moon, Brian K Leary, Anh-Dung Nguyen, Jean L McCrory

{"title":"A comparison of running biomechanics on track, asphalt, grass, and treadmill using wearable sensors.","authors":"Griffin R Moon, Brian K Leary, Anh-Dung Nguyen, Jean L McCrory","doi":"10.1080/14763141.2025.2511766","DOIUrl":"https://doi.org/10.1080/14763141.2025.2511766","url":null,"abstract":"Inertial Measurement Units (IMUs) allow assessment of running biomechanics outdoors on various surfaces. The purpose of our study was to compare peak tibial acceleration (PTA), stance time (ST), stride frequency (SF), and maximum rearfoot eversion velocity (MREV) when running on asphalt, track, grass, and on a treadmill. Twenty healthy participants ran on each surface at their self-selected speed. IMUs were placed on their right tibia and posterior aspect of their right shoe. A timing system was used to ensure consistent speed between surfaces. Thirty steps from each surface were analysed. Separate repeated measures ANOVAs or Friedman tests were performed on each dependent measure, depending on normality. Post-hoc analyses were performed when appropriate. SF, PTA, and MREV differed (p < .001) between surfaces. SF was highest on treadmill (83.4 ± 5.4 strides/sec) and slowest on grass (81.0 ± 4.2 strides/min). PTA was greater outdoors (asphalt: 11.0 ± 2.7 g, grass: 10.7 ± 3.4 g, and track: 10.6 ± 2.3 g), but less on treadmill (7.9 ± 1.6 g). MREV was lowest on grass (394.9 ± 256.5 deg/s) and greatest on track (623.5 ± 299.3 deg/s) and asphalt (620.7 ± 289.1 deg/sec). ST did not differ between surfaces (p = .231). Laboratory-based studies on running biomechanics may not reflect the running gait used on outdoor running surfaces.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-13"},"PeriodicalIF":2.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144163508","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

Force-velocity and power-velocity relationships in on-water rowing. 水上划艇的力-速度和功率-速度关系。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-28 DOI: 10.1080/14763141.2025.2511765

A Nordez, C Delhaye, F Teissier, F Colloud, N Peyrot, P Samozino

{"title":"Force-velocity and power-velocity relationships in on-water rowing.","authors":"A Nordez, C Delhaye, F Teissier, F Colloud, N Peyrot, P Samozino","doi":"10.1080/14763141.2025.2511765","DOIUrl":"https://doi.org/10.1080/14763141.2025.2511765","url":null,"abstract":"Force-velocity (FV) relationships are used to evaluate athletes and individualise training in several tasks. In rowing, only one previous study has determined FV relationships using ergometers. This study aimed to develop a method to obtain FV relationships during on-water rowing, to assess their quality and inter-day reliability and to compare them with ergometer profiles. Fourteen participants performed 8 all-out starts in instrumented double scull boats with 3 scull lengths under two conditions: two active rowers or one active and one passive rower. The FV relationships, reconstructed with all the conditions, were linear with a high goodness of fit (median R2: 0.96), covering 24.6 ± 5.0% of the velocity range. Ninety-five per cent confidence intervals for maximal force (F0: 3.9 ± 0.5%) and maximal velocity (V0: 6.2 ± 1.5%) were relatively narrow. The coefficient of variation for inter-day reliability was below 10% and intraclass correlation ranging from 0.69 for V0 to 0.96 for F0. Correlations between on-water and ergometer rowing were significant for F0 (r = 0.70) and Pmax (r = 0.82) but not for V0 (r = 0.11). F0 and V0 were significantly higher (23%) and lower (31%) on the ergometer, respectively. These results highlight a reliable linear FV relationship during on-water rowing to characterise rowing force production capacities, largely affected by on-water technical skills.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144163511","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

Effects of selected features of advanced footwear technology on lower limb joint work. 先进鞋类技术对下肢关节工作的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-26 DOI: 10.1080/14763141.2025.2508244

Ashna Ghanbari, Jordyn Vienneau, Sandro R Nigg, Benno M Nigg

{"title":"Effects of selected features of advanced footwear technology on lower limb joint work.","authors":"Ashna Ghanbari, Jordyn Vienneau, Sandro R Nigg, Benno M Nigg","doi":"10.1080/14763141.2025.2508244","DOIUrl":"https://doi.org/10.1080/14763141.2025.2508244","url":null,"abstract":"The objective of this study was to isolate the effects of two key components of Advanced Footwear Technology, the curved carbon fibre plate and the midsole material, on lower-limb joint work. Sixteen male recreational runners ran overground at a speed of 3.9 (±5%) metres per second in three shoe conditions: a standard Nike Vaporfly 4% (Original VP4), a modified version without the curved carbon fibre plate (No Plate) and a version with the PEBA midsole material replaced with EVA foam (EVA). Motion capture and force platform data were recorded to determine positive and negative metatarsophalangeal, ankle, knee, and hip joint work, and positive and negative foot + footwear work across the different conditions. Removing the carbon fibre plate significantly increased negative work at the metatarsophalangeal joint and positive work at the ankle. Replacing PEBA with EVA significantly reduced positive foot + footwear work. The findings of this study highlighted a group effect of the curved carbon fibre plate, which redistributed positive lower-limb joint work from the ankle to the metatarsophalangeal joint. Conversely, the results highlighted subject-specific differences in response to the midsole material, emphasising the importance of considering individual variability in footwear design elements to optimise athletic performance.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-15"},"PeriodicalIF":2.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144151740","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

Can biomechanical variables and asymmetry predict bone stress injuries in collegiate distance runners? 生物力学变量和不对称性能否预测大学生长跑运动员的骨应力损伤？

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-26 DOI: 10.1080/14763141.2025.2506563

Hannah B Archer, Sewan Kim, Harper E Stewart, Jill L McNitt-Gray, Michael E Hahn, Rodger Kram, Alena M Grabowski

{"title":"Can biomechanical variables and asymmetry predict bone stress injuries in collegiate distance runners?","authors":"Hannah B Archer, Sewan Kim, Harper E Stewart, Jill L McNitt-Gray, Michael E Hahn, Rodger Kram, Alena M Grabowski","doi":"10.1080/14763141.2025.2506563","DOIUrl":"https://doi.org/10.1080/14763141.2025.2506563","url":null,"abstract":"Runners are susceptible to bone stress injuries (BSI), due in part to cumulative loading, which is affected by force magnitude and frequency. We identified biomechanical variables that may predict BSI incidence by following 30 collegiate distance runners over three years. Athletes were classified as either uninjured (n = 8 male, 16 female) or injured (n = 3 male, 3 female) if they sustained a BSI. We measured ground reaction forces while athletes ran on a force-instrumented treadmill, and analysed step frequency (fstep), contact length (Lc), and bodyweight-normalised stance average vertical ground reaction force (Favg) alongside asymmetry (expressed as symmetry index, SI). A secondary analysis examined inter-limb biomechanical changes in six runners prior to sustaining a BSI. We found an interaction between injury status, sex, and speed on Favg values (p = 0.026). Forty-seven weeks prior to injury, Favg values were greater in the unaffected leg than the affected leg (p = 0.022). In addition, female injured runners exhibited 1.62 percentage points greater fstep SI than uninjured females at 4.9 m/s (p = 0.030). Future research that incorporates more frequent data collection is needed to integrate biomechanical variables and physiological risk factors for injury prediction and prevention among collegiate distance runners.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-16"},"PeriodicalIF":2.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144144231","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

Biomechanical adjustments during an exhaustive treadmill run: comparison of compression tights and running shorts. 在一个详尽的跑步机上的生物力学调整：压缩紧身衣和跑步短裤的比较。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-22 DOI: 10.1080/14763141.2025.2508241

Barbara J Schornstein, Meredith D Wells, D Clark Dickin, Lisa S Jutte, Henry Wang

{"title":"Biomechanical adjustments during an exhaustive treadmill run: comparison of compression tights and running shorts.","authors":"Barbara J Schornstein, Meredith D Wells, D Clark Dickin, Lisa S Jutte, Henry Wang","doi":"10.1080/14763141.2025.2508241","DOIUrl":"https://doi.org/10.1080/14763141.2025.2508241","url":null,"abstract":"Fatigue induces changes to running form resulting in movements that are less efficient. Reducing the amount of fatigue and its subsequent effect on form is valuable for improving running performance. It is unknown what effects compressive clothing has on musculature; however, there have been claims that it may reduce fatigue. The aim of this study was to determine whether compressive tights or running shorts are more beneficial for improving performance when running to exhaustion. Eleven runners ran at their current five-kilometre race pace on a treadmill to voluntary exhaustion in a repeated measures design wearing both compression tights and running shorts while their biomechanics, heart rate and rate of perceived exertion were recorded. Fatigue effects showed a less extended knee angle (p = 0.03) and a smaller ankle dorsiflexion angle (p = 0.04) at initial contact, and increased loading rate (p = 0.02) and vertical impact peak (p = 0.05). Condition effects included a shorter stride length (p = 0.01), faster stride rate (p = 0.01), and decreased hip range of motion (p = 0.02) with compression tights. There was no significant difference in time to exhaustion between conditions (p = 0.88). Thus, the length of time to fatigue was unaffected by condition, however, the altered mechanics when running in compression tights may reduce potential injury.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-11"},"PeriodicalIF":2.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144129140","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

Technical performance analyses in elite Paralympic swimming using wearable technology: two case studies. 使用可穿戴技术的残奥会精英游泳技术性能分析：两个案例研究。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-22 DOI: 10.1080/14763141.2025.2508239

Matthew Slopecki, Mathieu Charbonneau, Simon Deguire, Julie N Côté, Julien Clément

{"title":"Technical performance analyses in elite Paralympic swimming using wearable technology: two case studies.","authors":"Matthew Slopecki, Mathieu Charbonneau, Simon Deguire, Julie N Côté, Julien Clément","doi":"10.1080/14763141.2025.2508239","DOIUrl":"https://doi.org/10.1080/14763141.2025.2508239","url":null,"abstract":"We present two case studies that make use of wearable technology to provide performance indicators on optimal swim stroke techniques in breaststroke (case 1) and freestyle (case 2). In the first case study, we present and use a novel metric, the velocity variation score, to maximise breaststroke technical performance for an athlete with Achondroplasia Dwarfism, by comparing their normal technique to two alternates, focused on 1) fast arm sculling and 2) high stroke rate (HSR). We observed lower velocity variation scores using the adapted breaststroke techniques (p < 0.001), the HSR technique had the lowest velocity variation score (p < 0.001). In the second case, we determine the optimal breathing strategy, breathing to the impaired or unimpaired side, for an athlete with a unilateral hand impairment performing freestyle swimming. Results showed that the forward velocity was significantly lower in the left-to-right stroke cycle transition and right (arm pull) when breathing to the impaired (left) side. To varying degrees, these cases demonstrate that wearable-based intra-stroke analyses can provide individualised technique recommendations that benefit competitive race peformance.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-14"},"PeriodicalIF":2.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144129268","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

Agreement between an inertial measurement unit (IMU) algorithm and a photoelectric system for analysing spatiotemporal variables during overground and treadmill running. 惯性测量单元（IMU）算法与光电系统之间的协议，用于分析地上和跑步机上运行时的时空变量。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-21 DOI: 10.1080/14763141.2025.2502750

Unai Miqueleiz, Roberto Aguado-Jimenez, Pablo Lecumberri, Esteban M Gorostiaga

{"title":"Agreement between an inertial measurement unit (IMU) algorithm and a photoelectric system for analysing spatiotemporal variables during overground and treadmill running.","authors":"Unai Miqueleiz, Roberto Aguado-Jimenez, Pablo Lecumberri, Esteban M Gorostiaga","doi":"10.1080/14763141.2025.2502750","DOIUrl":"https://doi.org/10.1080/14763141.2025.2502750","url":null,"abstract":"The aim of this study was to assess the agreement between running stride variables measured simultaneously with an inertial sensor (MTw IMU) using a specific algorithm, and a floor-based photoelectric (Optojump; OJ) system among well-trained endurance runners, during overground and treadmill runs at speeds ranging from 9 to 21 km∙h-1. Five different filter settings (from 0_0 to 4_4) were used with the OJ to detect the contact event, based on the number of LEDs (from 1 to 5). No significant differences (p > 0.05) were found between the two devices in any of the stride variables when the 4_4 filter was implemented using the OJ. The agreement was good for contact time (CT) and flight time (FT) [r = 0.81-0.93; Typical error of the estimate (TEE%) = 3.2-7.5%], whereas for stride frequency (SF), stride length (SL) and stride time (ST) the agreement was almost perfect (r = 0.91-0.99; TEE% = 0.2-1.7%). The agreement worsened as the number of activated LEDs used to detect the contact event decreased. This suggests that the tested inertial sensor using a specific algorithm can achieve highly precise measurement of spatiotemporal parameters during both overground and treadmill running, compared to the OJ (4_4) system.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-19"},"PeriodicalIF":2.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144112430","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

Foot strike angle as key predictor of multi-plane knee joint moments in sidestep cutting: implications for ACL injury prevention. 足击角作为侧步切割中多平面膝关节力矩的关键预测因子：对前交叉韧带损伤预防的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-19 DOI: 10.1080/14763141.2025.2506552

Kevin Bill, Tron Krosshaug, Uwe G Kersting

{"title":"Foot strike angle as key predictor of multi-plane knee joint moments in sidestep cutting: implications for ACL injury prevention.","authors":"Kevin Bill, Tron Krosshaug, Uwe G Kersting","doi":"10.1080/14763141.2025.2506552","DOIUrl":"https://doi.org/10.1080/14763141.2025.2506552","url":null,"abstract":"Video analyses of ACL injury situations in change-of-direction tasks suggest an elevated injury risk during flatfooted or rearfoot landing. While loading in each individual plane of the knee can contribute to injury, combined loading seems to be the most likely mechanism. This study investigated if knee joint moments are related to the foot strike angle in pre-planned and unplanned handball-specific sidestep cuts performed by n = 51 female handball players. Canonical correlation analysis (CCA) with the foot strike angle at initial ground contact serving as the predictor variable was performed on the knee joint moment vector field (Mxyz). In both conditions, the foot strike angle was related to Mxyz. Subsequently, post-hoc tests were conducted using CCA for moment couples (Mxy, Mxz, Myz) and linear regression for individual moment components. Results revealed that traditional analyses focusing on individual planes only partially explain the observed relationships, particularly during the unplanned cutting condition. Given the time periods in which correlations exist, this study shows that manipulating the foot strike angle has the potential to reduce multi-plane knee loading associated with ACL injury, while limiting analyses to individual planes might underestimate the potential to mitigate ACL injury risk.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-11"},"PeriodicalIF":2.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144095498","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

Effects of the FIFA 11+ kids program on hip and knee muscle torque in soccer players of different age groups: a prospective quasi-experimental study. 国际足联11+儿童项目对不同年龄组足球运动员髋关节和膝关节肌肉扭矩的影响：一项前瞻性准实验研究。

IF 2 3区医学

Sports Biomechanics Pub Date : 2025-05-13 DOI: 10.1080/14763141.2025.2498331

Carla Dos Santos Fernandes, Mariana Tavares Fernandes, Cássio de Oliveira Souto, Brenda Rodrigues Ladislau, Bruna Cristina de Jesus Alves, Larissa Verona Sengling, Juliana Xavier de Faria, Daniel Ferreira Moreira Lobato

{"title":"Effects of the FIFA 11+ kids program on hip and knee muscle torque in soccer players of different age groups: a prospective quasi-experimental study.","authors":"Carla Dos Santos Fernandes, Mariana Tavares Fernandes, Cássio de Oliveira Souto, Brenda Rodrigues Ladislau, Bruna Cristina de Jesus Alves, Larissa Verona Sengling, Juliana Xavier de Faria, Daniel Ferreira Moreira Lobato","doi":"10.1080/14763141.2025.2498331","DOIUrl":"https://doi.org/10.1080/14763141.2025.2498331","url":null,"abstract":"This study compares the effects of the FIFA 11+ Kids program on lower limb isometric torque among young soccer athletes. Sixty-six male soccer athletes (aged 6-14 years) were allocated for convenience into three groups of different ages: G1 = 12-14 years, G2 = 9-11 years, and G3 = 6-8 years, on whom muscle assessments of isometric knee flexor and extensor torque and of isometric hip abductor and adductor torque were conducted before and after 8 weeks of the intervention. There was an increase in knee extensor torque (p < 0.001) in G1 and G2 and in knee flexor torque in G1 and G3 (p < 0.05) after the intervention, as well as an increase in hip abductor torque in G3 (p = 0.012). Further observations include an increase in hip adductor torque among all groups (p < 0.05) and in time-to-peak knee extensor torque in G1 (p = 0.005), as well as a decrease in time-to-peak knee extensor and hip adductor torque in G3 (p < 0.05) and in time-to-peak knee flexor torque in G2 (p = 0.022). As such, the FIFA 11+Kids program may produce a positive effect on knee extensor/flexor torque and hip abductor/adductor torque in young soccer athletes of different age groups, with an even greater effect when applied early (6-8 years).","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"1-15"},"PeriodicalIF":2.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144059315","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

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