Journal of Applied Biomechanics最新文献_第3页

Shoulder Kinematics Vary Over the Lifespan: A Study of Healthy Adults. 肩部运动学随寿命变化：一项健康成人的研究。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-07-21 DOI: 10.1123/jab.2025-0400

Kenzie B Friesen, Hannah Verity, Angelica E Lang

{"title":"Shoulder Kinematics Vary Over the Lifespan: A Study of Healthy Adults.","authors":"Kenzie B Friesen, Hannah Verity, Angelica E Lang","doi":"10.1123/jab.2025-0400","DOIUrl":"https://doi.org/10.1123/jab.2025-0400","url":null,"abstract":"Scapular kinematics are influenced by age, but the relationship in older populations and across functional tasks needs further investigation. The objective of this study was to examine scapular and humeral kinematics during the Work-Related Activities and Functional Task protocol across a broad age range. Eighty healthy adults (46 [20] y; 170 [11] cm; 78.8 [16.8] kg) completed the Work-Related Activities and Functional Task protocol and 2 planar elevations while shoulder motion was tracked with optical motion capture. Scapular and humeral angles were assessed in relation to age. Pearson correlation analyses showed that scapular tilt was significantly (P < .001) correlated with age at many humeral elevations during the comb hair (r = .443-.490), wash axilla (r = .478-.498), overhead reach (r = .256-.406), and sagittal flexion (r = .316-.426) movements. Two-way analyses of variance with sex and age group factors (older [>65] and younger [<35] only) revealed that the older group had significantly more scapular posterior tilt, and statistical parametric mapping independent t tests showed that older adults also used consistently more humeral elevation during several movements. These findings provide insight into the interacting influence of age and shoulder kinematics on shoulder musculoskeletal health.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-9"},"PeriodicalIF":1.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148563810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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-Extremity Kinematics During Ice Hockey Goaltender Stances. 冰球守门员姿态中的下肢运动学。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-07-21 DOI: 10.1123/jab.2025-0285

Margaret S Harrington, Timothy A Burkhart

{"title":"Lower-Extremity Kinematics During Ice Hockey Goaltender Stances.","authors":"Margaret S Harrington, Timothy A Burkhart","doi":"10.1123/jab.2025-0285","DOIUrl":"https://doi.org/10.1123/jab.2025-0285","url":null,"abstract":"Goaltending techniques have evolved to include goaltenders dropping to their knees to cover the lower part of the net, utilizing stances, such as the butterfly and reverse vertical horizontal (RVH). These stances are suggested to place considerable stress on the hip, knee, and ankle joints compared with traditional stances (eg, standing and vertical horizontal). However, the kinematic differences between these techniques and potential implications for injury risk have not been fully explored. This study aimed to quantify 3D lower-extremity joint kinematics during key goaltending stances. The 3D hip, knee, and ankle angles of 26 goaltenders (mean (SD): age = 19.5 (2.3) y) were quantified during key goaltending stances (ie, butterfly, standing ready, RVH, and vertical horizontal) using Theia3D markerless technology. The butterfly and RVH compared with the standing ready and vertical horizontal demonstrated higher mean hip internal rotation (16.6° and 22.2° vs 5.2° and 11.4°, respectively) and ankle external rotation (11.7° and 15.9° vs -1.6° and -10.8°). Compared with the standing ready, the kneeling stances (vertical horizontal, butterfly, and RVH) also involved higher mean knee abduction (5.6° vs 12.4° to 15.1°) and external rotation (0.7° vs 13.0° to 21.3°). The butterfly and RVH stances showed riskier kinematics for common hip, knee, and ankle injuries in goaltenders.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-8"},"PeriodicalIF":1.6,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148563724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Sex-Moderated Effects of Soccer Cleat Stud Shape and Fatigue on Traction and Knee Joint Mechanics During Lateral Cutting. 足球钉鞋钉形和疲劳对侧切时牵引力和膝关节力学的性别调节效应。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-07-16 DOI: 10.1123/jab.2025-0132

Emily Karolidis, Michael E Hahn

{"title":"Sex-Moderated Effects of Soccer Cleat Stud Shape and Fatigue on Traction and Knee Joint Mechanics During Lateral Cutting.","authors":"Emily Karolidis, Michael E Hahn","doi":"10.1123/jab.2025-0132","DOIUrl":"https://doi.org/10.1123/jab.2025-0132","url":null,"abstract":"Market-available soccer footwear is predominantly designed according to male athlete mechanics. With known sex differences in cutting strategies, it should not be assumed that the female body can withstand the same amount of traction as males. Mechanical stability of the lower limbs is affected by fatigue, with negative effects most pronounced in female athletes. Soccer cleats could play a key role in moderating female athletes' exposure to torsional injury mechanisms across game play, such as those mechanisms in anterior cruciate ligament injury. This study investigates the influence of soccer cleat stud shape, elliptical, and bladed on traction utilization and knee mechanics of male and female participants during lateral cutting before and after fatigue progression. College-aged soccer participants (10 males, 10 females) performed 2 data collections in cleated footwear of different stud shapes. Lower limb kinetics and kinematics were compared between cleats and across fatigue states. No interaction effects were found on knee mechanics, though main effects of sex and fatigue were observed. A 3-way interaction on the rate of traction utilized at initial contact was found, demonstrating the influence of fatigue and cleat on sex-specific ground interactions. Future works are warranted to understand the effect of high-performance product on female mechanics.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-9"},"PeriodicalIF":1.6,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148474314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Dynamic Knee Stability and Movement Strategy During a Forward Lunge After Anterior Cruciate Ligament Reconstruction: A Comparison of Individuals With and Without Knee Pain. 前交叉韧带重建后向前弓步的动态膝关节稳定性和运动策略：有和没有膝关节疼痛的个体的比较。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-07-10 DOI: 10.1123/jab.2025-0187

Mads Skipper Sørensen, Jonas Schwarz Larsen, Lauri Stenroth, Elisabeth Bandak, Johannes Iuel Berg, Kasper Krommes, Henning Bliddal, Per Hölmich, Marius Henriksen, Tine Alkjær

{"title":"Dynamic Knee Stability and Movement Strategy During a Forward Lunge After Anterior Cruciate Ligament Reconstruction: A Comparison of Individuals With and Without Knee Pain.","authors":"Mads Skipper Sørensen, Jonas Schwarz Larsen, Lauri Stenroth, Elisabeth Bandak, Johannes Iuel Berg, Kasper Krommes, Henning Bliddal, Per Hölmich, Marius Henriksen, Tine Alkjær","doi":"10.1123/jab.2025-0187","DOIUrl":"https://doi.org/10.1123/jab.2025-0187","url":null,"abstract":"Individuals with anterior cruciate ligament reconstruction and knee pain (symptomatic) have demonstrated reduced knee extensor strength and similar knee joint loading during a forward lunge (FL) as compared with those without pain (asymptomatic) 3-10 years after anterior cruciate ligament reconstruction. Still, the dynamic knee joint stability during FL may differ between the groups. This study examined dynamic knee stability, measured by knee wobble through 3D kinematic modeling, to explore if symptomatic individuals exhibit more mediolateral knee wobble than asymptomatic individuals. Additionally, kinematic and kinetic movement strategy differences between the groups were investigated. Musculoskeletal modeling of the FL was applied to quantify knee wobble and other biomechanical parameters. In total, 33 symptomatic and 89 asymptomatic participants were included. No significant difference in knee wobble was observed between groups (mean difference: -0.16 [95% CI, -0.61 to 0.29], P = .480). Overall, only negligible between-group movement pattern differences were observed, most notably, the symptomatic group exhibited less concentric knee work (mean difference: 0.16 J/kg [95% CI, 0.04 to 0.28], P = .012) compared to the asymptomatic group. These findings suggest that symptomatic and asymptomatic individuals exhibit similar dynamic knee stability and movement strategies during the FL, 3-10 years after anterior cruciate ligament reconstruction.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-9"},"PeriodicalIF":1.6,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148426532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Influence of Different Starting Block Distances on Internal Tibial Load in Elite Sprinters. 不同起跑距离对优秀短跑运动员胫骨内负荷的影响。

IF 1.3 4区医学

Journal of Applied Biomechanics Pub Date : 2026-06-10 DOI: 10.1123/jab.2026-0001

Zilong Lu, Enze Shao, Dong Sun, Jun Wen, Tibor J Goda, Yang Song, Jiazhong Zhu, Yaodong Gu

{"title":"The Influence of Different Starting Block Distances on Internal Tibial Load in Elite Sprinters.","authors":"Zilong Lu, Enze Shao, Dong Sun, Jun Wen, Tibor J Goda, Yang Song, Jiazhong Zhu, Yaodong Gu","doi":"10.1123/jab.2026-0001","DOIUrl":"https://doi.org/10.1123/jab.2026-0001","url":null,"abstract":"In sprint running, the starting block distance (SBD) directly influences an athlete's start performance, yet there is a lack of research exploring how block distance affects internal tibial load. Therefore, this study examined internal tibial loading in 28 elite sprinters using finite element analysis. Maximum principal stress, shear stress, total deformation, and bending moments were assessed under 3 front block distances (50%, 60%, and 70% of leg length). A 2-way analysis of variance evaluated the effects of gender, SBD, and their interaction. The results showed a significant main effect of gender on maximum principal stress (P < .001), tibial bending moment (P < .001), maximum shear stress (P < .001), and total deformation (P < .001). Furthermore, significant gender-by-SBD interactions for maximum principal stress (P = .001, ηp2=.16) and maximum shear stress (P = .02, ηp2=.05) indicated distinct mechanical responses between male and female athletes in response to SBD settings. This finding suggests that adopting block settings previously reported to optimize start performance (eg, front block distance [FB]/interblock spacing length [SL] 50/45) may inevitably increase internal tibial loading, potentially elevating the risk of cumulative injuries such as medial tibial stress syndrome.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-10"},"PeriodicalIF":1.3,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148220759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Differences During Overground Walking in Virtual Reality: A Comparative Study With a Real Environment. 虚拟现实中地面行走的生物力学差异：与真实环境的比较研究。

IF 1.3 4区医学

Journal of Applied Biomechanics Pub Date : 2026-06-03 DOI: 10.1123/jab.2025-0301

Zhiyu Tao, Teerapapa Luecha, Ping Yeap Loh, Seiji Saito, Satoshi Muraki

{"title":"Biomechanical Differences During Overground Walking in Virtual Reality: A Comparative Study With a Real Environment.","authors":"Zhiyu Tao, Teerapapa Luecha, Ping Yeap Loh, Seiji Saito, Satoshi Muraki","doi":"10.1123/jab.2025-0301","DOIUrl":"https://doi.org/10.1123/jab.2025-0301","url":null,"abstract":"Realistically simulating natural walking is essential to create an immersive virtual reality experience. However, differences between the virtual reality environment (VRE) and real environment (RE) can alter gait characteristics. Therefore, this study aimed to investigate differences in lower limb spatiotemporal parameters, joint kinematics, and muscle activity between overground walking in a VRE and RE. A total of 13 participants walked at 3 cadences (60 steps per minute [SPM], 80 SPM, and 100 SPM) in the VRE and RE. Motion capture and electromyography were employed to collect the spatiotemporal gait parameters, muscle activities of the right tibialis anterior and medial gastrocnemius muscles, and right lower limb joint angles of the participants. Our results showed that overground walking in the VRE altered several spatiotemporal gait parameters. In addition, the mean electromyography activity of the tibialis anterior and medial gastrocnemius muscles was reduced in the VRE during the initial double- and single-support phases. Most measured biomechanical parameters showed no significant interaction between the walking cadence and environment. This study clarifies biomechanical differences underlying the more cautious gait observed in a VRE, offering practical implications to enhance usability and optimize virtual reality locomotion design.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-10"},"PeriodicalIF":1.3,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148165601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Influence of Relative Schoolbag Mass on Gait Biomechanics of South African Adolescents: The Role of Sex and Grade. 南非青少年书包相对质量对步态生物力学的影响：性别和年级的作用。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-05-27 Print Date: 2026-10-01 DOI: 10.1123/jab.2025-0365

Clément N Gambelli, Suleen Peens, Andries F van Oort, Mark Kramer

{"title":"The Influence of Relative Schoolbag Mass on Gait Biomechanics of South African Adolescents: The Role of Sex and Grade.","authors":"Clément N Gambelli, Suleen Peens, Andries F van Oort, Mark Kramer","doi":"10.1123/jab.2025-0365","DOIUrl":"10.1123/jab.2025-0365","url":null,"abstract":"Heavy schoolbags are common among school-aged adolescents, yet biomechanical consequences across developmental stages and between sexes remain poorly defined, especially in low- and middle-income countries. This study investigated the effect of schoolbag carriage on gait in South African adolescents. A total of 186 injury-free adolescents (ages 12-18) completed barefoot walking trials over a pressure platform under unloaded and loaded conditions. Spatiotemporal and kinetic gait parameters were recorded and normalized to body height and weight. Analyses included (1) comparison of schoolbag mass by sex and grade (ie, school year); (2) evaluation of gait by loading condition, grade, and sex; and (3) prediction of loaded-condition gait parameters by relative schoolbag mass. Grades 8 to 11 carried higher absolute loads and grade 8 carried highest relative loads, with 58% exceeding 15% body mass, but no sex differences were found. Load carriage increased stance and double support time; reduced swing phase; and elevated vertical forces, pressures, and loading rates. Females exhibited higher forefoot and midfoot pressures and narrower step width. Relative schoolbag mass predicted greater forefoot/heel loads, lower midfoot loads, and narrower step width. Schoolbag carriage imposes substantial biomechanical demands, particularly in early adolescence and among females, emphasizing need for age- and sex-specific guidelines to mitigate long-term musculoskeletal risk.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"401-408"},"PeriodicalIF":1.6,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148058405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Influence of Body Configuration on Kinetics and Multijoint Control Strategies Sprinters Use During the First Step Out of Blocks. 身体形态对短跑运动员踏出第一步时的动力学和多关节控制策略的影响。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-05-18 Print Date: 2026-10-01 DOI: 10.1123/jab.2024-0201

Harper E Stewart, Rand R Wilcox, Jill L McNitt-Gray

{"title":"Influence of Body Configuration on Kinetics and Multijoint Control Strategies Sprinters Use During the First Step Out of Blocks.","authors":"Harper E Stewart, Rand R Wilcox, Jill L McNitt-Gray","doi":"10.1123/jab.2024-0201","DOIUrl":"10.1123/jab.2024-0201","url":null,"abstract":"Sprinters need to generate horizontal impulse quickly in the first step out of the blocks to accelerate the body toward the finish line. The purpose of this study was to determine how body configuration at initial foot contact was correlated to ground reaction force measures and multijoint control during the first step out of the blocks by highly trained to world-class sprinters. Measurements of ground reaction forces and segment kinematics during sprint starts performed during a training session revealed that positioning the foot further behind the center of mass at initial contact significantly correlated with shorter contact times, greater average horizontal forces, and increased net joint moment impulse on the knee during the impact phase. Increases in average horizontal forces were significantly correlated with smaller magnitudes of shank angular velocity during the impact phase and shorter times to peak thigh angular velocity during the postimpact phase. We also used kinetic and kinematic data to provide feedback regarding an athlete's mechanics to coaches for use within a training session on the track.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"425-433"},"PeriodicalIF":1.6,"publicationDate":"2026-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147977323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Validity of Whole-Body and Segmental Angular Momenta During Walking in Older Individuals With and Without Transtibial Limb Loss. 评估老年人行走时全身和节段角动量的有效性，不论有无胫性肢体丧失。

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-05-11 Print Date: 2026-10-01 DOI: 10.1123/jab.2025-0300

Arianna S Monteiro, Nicholas P Fey, Matthew J Major

{"title":"Assessing the Validity of Whole-Body and Segmental Angular Momenta During Walking in Older Individuals With and Without Transtibial Limb Loss.","authors":"Arianna S Monteiro, Nicholas P Fey, Matthew J Major","doi":"10.1123/jab.2025-0300","DOIUrl":"10.1123/jab.2025-0300","url":null,"abstract":"Older individuals (≥65 y old) with and without lower limb loss experience a high prevalence of falls. Minimizing fall risk depends on an individual's ability to maintain dynamic balance. A metric often used to characterize an individual's ability to regulate dynamic balance is angular momenta during steady-state walking. However, a gap exists in the validity of angular momenta as a measure of dynamic balance in these cohorts. The goal of this study was to evaluate the validity of angular momenta in older individuals with and without transtibial amputation during walking through assessments of construct and criterion validity. Construct and criterion validity were evaluated through correlations of momenta with clinical balance measures and prospective fall numbers over 12 months, respectively. For context, falls were categorized by pattern and scenario. Angular momenta of walking demonstrated evidence of construct and criterion validity in both groups through moderate-to-strong correlations with clinical balance measures and prospective falls. These relationships also varied between groups. The most common pattern and scenario of falls in both groups were trips and level-ground walking, respectively. This study contributes evidence that angular momentum during level-ground walking is a valid measure of dynamic balance in older persons with and without transtibial amputation.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"419-424"},"PeriodicalIF":1.6,"publicationDate":"2026-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13317139/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147876694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Agreement and Repeatability of a Smartphone-Based Markerless System (OpenCap) Versus Marker-Based Motion Capture During Treadmill Walking and Running. 基于智能手机的无标记系统（OpenCap）与基于标记的运动捕捉在跑步机行走和跑步中的一致性和可重复性

IF 1.6 4区医学

Journal of Applied Biomechanics Pub Date : 2026-05-07 Print Date: 2026-10-01 DOI: 10.1123/jab.2026-0021

Edilson Fernando de Borba, Augusto Rossa Inda, Bruna Machado Herberts, Lucas de Liz Alves, Bilal Mohamad Ibrahim, Fernando Matheus de Mello Fernandes, Natália Rocha Palma, Gustavo de Oliveira Hoffmann, Rauce Marçal da Silva, Leonardo Alexandre Peyré-Tartaruga, Marcus Peikriszwili Tartaruga

{"title":"Agreement and Repeatability of a Smartphone-Based Markerless System (OpenCap) Versus Marker-Based Motion Capture During Treadmill Walking and Running.","authors":"Edilson Fernando de Borba, Augusto Rossa Inda, Bruna Machado Herberts, Lucas de Liz Alves, Bilal Mohamad Ibrahim, Fernando Matheus de Mello Fernandes, Natália Rocha Palma, Gustavo de Oliveira Hoffmann, Rauce Marçal da Silva, Leonardo Alexandre Peyré-Tartaruga, Marcus Peikriszwili Tartaruga","doi":"10.1123/jab.2026-0021","DOIUrl":"10.1123/jab.2026-0021","url":null,"abstract":"Marker-based motion capture is the gold standard for 3-dimensional gait analysis but is expensive and largely confined to specialized laboratories. Smartphone-based markerless tools such as OpenCap could scale gait assessment, yet their validity and repeatability during treadmill walking and running remain unclear. We evaluated agreement and within-session repeatability between OpenCap and motion capture during treadmill walking (4 km·h-1) and running (8 and 14 km·h-1) in 10 healthy adults, recorded simultaneously with both systems. We computed spatiotemporal variables, sagittal hip/knee/ankle angle waveforms and range of motion, and center-of-mass displacement waveforms and range of motion. Agreement was assessed with Bland-Altman, intraclass correlation coefficients, Pearson r, and root mean square error; repeatability with trial-to-trial SD, coefficient of variation, and waveform variability index (GaitSD). Spatiotemporal metrics showed bias close to 0 and very strong associations (r ≥ .96), with small minimum detectable changes (eg, ≤0.01 m for stride length and ≤0.03 s for temporal variables). Sagittal range of motion showed good-to-excellent reliability (bias: ≈-4.5° to 2.9°, intraclass correlation coefficients = .76-.93). Waveform root mean square error was ≈1° to 4° for joint angles and ≈0.1 to 0.5 cm for center of mass, and statistical parametric mapping indicated only localized differences. Repeatability and GaitSD were comparable between systems across variables and speeds. Under controlled treadmill conditions, OpenCap showed comparable performance and repeatability metrics to motion capture.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"409-418"},"PeriodicalIF":1.6,"publicationDate":"2026-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147846261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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