Journal of biomechanics最新文献

Towards structure-aware surrogate modeling: explicit region interaction improves knee contact stress prediction in young men. 迈向结构感知替代模型：显式区域相互作用改善年轻男性膝关节接触应力预测。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-06 DOI: 10.1016/j.jbiomech.2026.113350

Zhengye Pan, Jianwei Zuo, Jiajia Luo

{"title":"Towards structure-aware surrogate modeling: explicit region interaction improves knee contact stress prediction in young men.","authors":"Zhengye Pan, Jianwei Zuo, Jiajia Luo","doi":"10.1016/j.jbiomech.2026.113350","DOIUrl":"https://doi.org/10.1016/j.jbiomech.2026.113350","url":null,"abstract":"<p><p>Knee contact-stress hotspots are closely linked to meniscal/cartilage injury risk. Still, high-fidelity subject-specific FEA is too computationally expensive for large-cohort, multi-condition, near-real-time use. Existing MeshGraphNet (MGN)-style surrogates mainly rely on stacked local message passing, which is often insufficient for modeling long-range dependencies and limits interpretability. This study benchmarked a deep-stacked MGN baseline against three explicit region-interaction MGN architectures using data from nine young male soccer players performing a 90° change-of-direction task. Under a strict cross-subject evaluation framework, we assessed whole-field error, peak stress fidelity, and hotspot spatial consistency under matched computational budgets. Region-interaction models significantly reduced whole-field nodal stress errors compared to the purely stacked baseline. Crucially, they achieved markedly higher accuracy in reconstructing the high-stress tail and demonstrated superior spatial consistency and temporal robustness in localizing high-risk stress hotspots. These findings from a young-male cohort suggest that explicit region-level interaction may provide a more structure-aligned surrogate modeling paradigm for knee contact mechanics, yielding stronger risk-relevant stress phenotype recovery under comparable computational budgets while supporting more interpretable injury-risk assessment.</p>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"203 ","pages":"113350"},"PeriodicalIF":2.4,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147856408","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

Simultaneous stabilizing feedback control of linear and angular momentum in human walking 人类行走中线动量和角动量的同步稳定反馈控制。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-03-02 DOI: 10.1016/j.jbiomech.2026.113240

Jaap H. van Dieën, Sjoerd M. Bruijn, Koen K. Lemaire, Dinant A. Kistemaker

{"title":"Simultaneous stabilizing feedback control of linear and angular momentum in human walking","authors":"Jaap H. van Dieën, Sjoerd M. Bruijn, Koen K. Lemaire, Dinant A. Kistemaker","doi":"10.1016/j.jbiomech.2026.113240","DOIUrl":"10.1016/j.jbiomech.2026.113240","url":null,"abstract":"<div><div>Stabilizing bipedal gait is mechanically challenging. To analyze how gait is stabilized, previous studies have focused on the control of the body center of mass (CoM). These studies often linked deviations in linear momentum of the CoM to subsequent shifts in position of the center of pressure (CoP), or of the foot, relative to the COM, and interpreted these as stabilizing responses to correct linear CoM momentum. Mechanically, however, CoP shifts do not cause changes of linear CoM momentum, whereas they do cause changes in whole-body angular momentum. We hypothesized that experimentally observed correlations between CoP to CoM distance and horizontal ground reaction forces are related to the need to control both linear and whole-body angular momentum. We show that, in human walking, linear and angular momentum follow quasi-periodic functions with similar periodicity and phase. Combining the equations of linear and rotational motion for a system of linked rigid segments shows that, in this case, the horizontal distance between CoP and CoM should be correlated to horizontal force in the corresponding direction. This suggests that linear and angular momentum are simultaneously controlled and may explain the success of preceding studies that correlated CoM states to CoP or foot locations. Regression models fitted to experimental data of participants walking at normal and slow speeds showed that deviations in horizontal ground reaction forces and in moments of the ground reaction force about the sagittal and transverse axes could be predicted from deviations in the preceding linear and angular momentum respectively. Our analyses support that linear and angular momentum are indeed controlled simultaneously in human walking.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113240"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147369142","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

Joint angle and muscle length manipulation reveal regional uniformity of sarcomere lengths in the passive rat medial gastrocnemius 关节角度和肌肉长度操作揭示了被动大鼠腓肠肌内侧肌节长度的区域均匀性。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-02-26 DOI: 10.1016/j.jbiomech.2026.113232

Guido Geusebroek , Chris Tijs , Wendy Noort , Han Houdijk , Jaap van Dieën , Huub Maas

{"title":"Joint angle and muscle length manipulation reveal regional uniformity of sarcomere lengths in the passive rat medial gastrocnemius","authors":"Guido Geusebroek , Chris Tijs , Wendy Noort , Han Houdijk , Jaap van Dieën , Huub Maas","doi":"10.1016/j.jbiomech.2026.113232","DOIUrl":"10.1016/j.jbiomech.2026.113232","url":null,"abstract":"<div><div>The elongation of musculotendinous substructures attained during muscle stretching determines acute and long-term effects of stretching. We assessed how elongation is distributed across substructures of the rat medial gastrocnemius (MG) and how MG sarcomere elongation relates to plantarflexion resistance when the MG is stretched through joint rotation. We fixated 48 rat hindlimbs in 16 combinations of knee and ankle joint angles (55°, 90°, 125° and 160°), with three limbs per combination. We measured the MG muscle-belly length and the pennation angle in the proximal and distal region. We dissected four to five muscle-fibers from proximal, intermediate and distal muscle-belly regions and measured fiber and sarcomere length. We compared fiber and sarcomere lengths across regions and assessed how muscle-belly lengthening induced by knee or ankle rotation affected fiber length, sarcomere length and pennation angle. Lastly we measured plantarflexion torque of 12 rats in a range of ankle angles from 120° to 70° with the knee fixed in 90°. We found that pennation angles decreased and that fibers and sarcomeres lengthened uniformly across MG regions in response to muscle-belly lengthening. The onset of sarcomere lengthening (beyond 2.1 µm) preceded the onset of passive plantarflexion torque by aproximately 20°. Muscle-belly lengthening induced by ankle rotation had a greater impact on mean sarcomere length, fiber length, and pennation angle compared to knee rotation. In conclusion, sarcomeres lengthen uniformly across MG regions.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113232"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147372590","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

Development and validation of a deep learning markerless system for lower-limb kinematics in hip and knee osteoarthritis population 髋关节和膝关节骨关节炎患者下肢运动学的深度学习无标记系统的开发和验证。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-03-03 DOI: 10.1016/j.jbiomech.2026.113238

Junqing Wang , Tengfei Li , Wei Xu , Bo Hu , Fashu Xu , Bin Song , Yong Nie , Yubo Fan , Kang Li

{"title":"Development and validation of a deep learning markerless system for lower-limb kinematics in hip and knee osteoarthritis population","authors":"Junqing Wang , Tengfei Li , Wei Xu , Bo Hu , Fashu Xu , Bin Song , Yong Nie , Yubo Fan , Kang Li","doi":"10.1016/j.jbiomech.2026.113238","DOIUrl":"10.1016/j.jbiomech.2026.113238","url":null,"abstract":"<div><div>With the advancement of deep learning technology, markerless systems have emerged as a cost-effective and user-friendly alternative to marker-based systems. However, most existing markerless systems are developed using datasets from healthy individuals, which limits their generalizability to patient populations. Therefore, this study developed a four-camera markerless system using a dataset of patients with osteoarthritis and validated its measurement accuracy in lower-limb kinematics. A total of 150 patients with hip or knee osteoarthritis were allocated to a training set (n = 120) and a test set (n = 30). Kinematic data during gait were simultaneously collected using both markerless and marker-based systems. We developed a four-camera markerless system on the training set. In the test set, the kinematic differences between the markerless and marker-based systems over the gait cycle were assessed using root mean square error (RMSE) and intraclass correlation coefficient (ICC). The grand mean position difference and ICC for the keypoints predicted by the markerless system were 13.4 mm and 0.93, respectively. Additionally, the mean RMSE for all joint angles was 4.1°. The ICC for the joint angle waveforms between the markerless and marker-based systems in the sagittal, frontal, and transverse planes were 0.93, 0.50, and 0.34, respectively. Our four-camera markerless system, developed using data from patient populations, shows high accuracy in keypoints and sagittal plane joint angles prediction. This indicates that our markerless system is suitable for osteoarthritis populations and offers a cost-effective and convenient tool for disease-related biomechanical research.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113238"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147372608","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

Spatiotemporal mapping of plantar shear forces during human walking using a flexible thin-film sensor 基于柔性薄膜传感器的人体行走过程中足底剪切力的时空映射。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-03-03 DOI: 10.1016/j.jbiomech.2026.113239

Kohei Nishizawa, Naomichi Ogihara

{"title":"Spatiotemporal mapping of plantar shear forces during human walking using a flexible thin-film sensor","authors":"Kohei Nishizawa, Naomichi Ogihara","doi":"10.1016/j.jbiomech.2026.113239","DOIUrl":"10.1016/j.jbiomech.2026.113239","url":null,"abstract":"<div><div>During walking, the foot is subjected to complex vertical and shear ground reaction forces, which play critical roles in gait mechanics and the development of foot pathologies. However, plantar shear stress has been less investigated due to measurement difficulties. This study aimed (1) to evaluate the accuracy of a newly developed thin-film shear force distribution sensor in measuring plantar pressure and shear stress during walking, and (2) to characterize the spatiotemporal features of plantar shear loading throughout the stance phase. Five healthy male adults participated in walking experiments using the thin-film sensor affixed to a force plate for reference. The sensor measures normal and shear forces with a resolution of 24 × 24 sensing points over a 312 × 312 mm area. Force outputs were sampled at 100 Hz and compared with the ground reaction forces obtained from the force plate. The integrated vertical and shear components from the thin-film sensor showed good agreement with the force plate data, confirming its accuracy and reliability. Spatiotemporal shear maps revealed dynamic changes in magnitude and direction across stance: posterior shear beneath the heel during early stance, medial rotation at mid-stance, and anterior propulsion beneath the forefoot during push-off. This sensing system enables continuous mapping of plantar shear and pressure distributions, providing a practical tool for gait analysis and the prevention of foot disorders such as diabetic ulcers and hallux valgus.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113239"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147369129","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 segmental dynamics of the lower leg in the side-volley kick in male soccer players 男子足球运动员侧抽射时小腿的节段动力学

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-03-08 DOI: 10.1016/j.jbiomech.2026.113249

Tsuyoshi Iitake, Hiroyuki Nunome

{"title":"The segmental dynamics of the lower leg in the side-volley kick in male soccer players","authors":"Tsuyoshi Iitake, Hiroyuki Nunome","doi":"10.1016/j.jbiomech.2026.113249","DOIUrl":"10.1016/j.jbiomech.2026.113249","url":null,"abstract":"<div><div>The present study aimed to clarify the differences in interaction torques acting on the kicking limb by expressing them as functions of the relative linear accelerations in a linked lower leg system. Twenty experienced male university-level soccer players (19.5 ± 1.1 years, 1.75 ± 0.06 m, 69.2 ± 5.5 kg) were instructed to perform the side-volley and instep kicks as forcefully as possible. The kicking motions were captured using a 12-camera optoelectronic motion capture system at 500 Hz. To describe the differences in the detailed mechanics of the interaction torques between the two kicks, the acceleration of the lower leg centre of gravity was decomposed into the relative accelerations of adjacent body landmarks from the support leg’s hip joint, which allowed us to calculate the interaction torques due to accelerative actions of these body landmarks. The side-volley kick generated significantly smaller total interaction torque and the interaction torque due to the support leg’s hip in the final phase of kicking than the instep kick. There was a distinctive difference between the two kicks in the practical accelerative actions at the support leg’s hip. In the side-volley kick, while the interaction torque due to the vertical acceleration of the support leg’s hip was negligible during kicking, that due to the horizontal acceleration (towards the left from the back-view of right-footed players) had the most considerable magnitude. The horizontal acceleration is most likely derived from the support leg’s hip adduction joint torque, apparent in the latter part of kicking.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113249"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387725","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

Numerical modelling of airflow and aerosol particle delivery in cats with bronchial and non-bronchial disease 患有支气管和非支气管疾病的猫体内气流和气溶胶颗粒输送的数值模拟。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-02-26 DOI: 10.1016/j.jbiomech.2026.113233

Carla Zamora-Perarnau , Mauro Malvè , Rocío Fernández-Parra

{"title":"Numerical modelling of airflow and aerosol particle delivery in cats with bronchial and non-bronchial disease","authors":"Carla Zamora-Perarnau , Mauro Malvè , Rocío Fernández-Parra","doi":"10.1016/j.jbiomech.2026.113233","DOIUrl":"10.1016/j.jbiomech.2026.113233","url":null,"abstract":"<div><div>Feline lower airway disease comprises a spectrum of inflammatory conditions, including asthma, which is commonly treated with inhaled glucocorticoids. This study employs computed tomography (CT)–based computational fluid dynamics (CFD) models to characterize airflow dynamics in feline lower airways with and without bronchial disease (BD and NBD), evaluating velocity, pressure, wall shear stress, and airway resistance under different flow conditions. In addition, deposition patterns of two aerosol particle sizes (1 µm and 10 µm) were assessed within the trachea and bronchi.</div><div>Geometrical reconstructions of the trachea and lobar bronchi were generated from CT scans of 24 cats, classified into BD and NBD groups. Simulations were performed using two airflow conditions and two particle diameters. Airflow parameters and aerosol particle deposition were calculated for each model.</div><div>A trend toward higher values of most airflow parameters was observed in the NBD group, except for expiratory resistance and velocity. However, no statistically significant differences in airflow parameters were identified between groups. Particle deposition analysis showed a higher deposition fraction for larger particles, with 10 µm particles depositing more frequently on bronchial walls than 1 µm particles in both groups.</div><div>Overall, CT-based CFD analysis revealed no significant group differences in resistance, pressure, wall shear stress, or velocity. Nevertheless, particle size influenced deposition patterns, with larger particles showing increased bronchial trapping. Although the initial hypothesis was not confirmed, this feasibility and characterization study establishes a methodological framework for future <em>in silico</em> investigations of feline lower airway disease providing preliminary physiologically and clinically relevant insights.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113233"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147365297","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

Modes of centripetal ground reaction force application in curved sprinting on an athletic track in male athletes 向心地面反作用力在男子运动员弯曲跑道短跑中的作用模式

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-02-06 DOI: 10.1016/j.jbiomech.2026.113186

Yasuko Hirono, Norihisa Fujii

{"title":"Modes of centripetal ground reaction force application in curved sprinting on an athletic track in male athletes","authors":"Yasuko Hirono, Norihisa Fujii","doi":"10.1016/j.jbiomech.2026.113186","DOIUrl":"10.1016/j.jbiomech.2026.113186","url":null,"abstract":"<div><div>Curve sprinting requires a centripetal ground reaction force (GRF) impulse, causing biomechanical leg asymmetries. However, the strategies for modulating this impulse, its primary determinants (contact duration versus GRF magnitude), and specific joint kinetic and kinematic contributions remain unclear. This study investigated these impulse determinants and identified lower-limb factors associated with the magnitude of the GRF to elucidate asymmetrical leg modes in curve sprinting. Fifteen experienced male sprinters performed submaximal sprints on a 42-m-radius curve. Three-dimensional kinematic data and GRFs were recorded, joint torques were calculated, and partial least squares regression (PLSR) was used to assess key relationships. The centripetal impulse was strongly correlated with the mean centripetal GRF for both legs but not with the contact duration. Thus, the mean centripetal GRF, rather than the contact duration, was the primary determinant of the centripetal impulse during curve sprinting for both legs, supporting our first hypothesis. The PLSR results revealed functionally distinct asymmetrical modes: the left leg engaged in a complex turning and stability mode, defined by specific hip/ankle torques, and suppressed outward push. Conversely, the right leg relied on a dominant whole-limb inclination of the knee and ankle joint axis, along with a contribution from the ankle plantarflexion torque. These findings highlight distinct asymmetrical mechanisms of GRF application, thereby advancing our understanding of curve-sprinting biomechanics.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113186"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387723","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

Knee and hip joint dynamics differ between sprinting and Nordic hamstring exercises 在短跑和北欧腿筋运动中，膝关节和髋关节的动态是不同的

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-03-03 DOI: 10.1016/j.jbiomech.2026.113236

Kristen Steudel , Nicos Haralabidis , Reed Gurchiek , Jennifer Hicks , Scott Delp

{"title":"Knee and hip joint dynamics differ between sprinting and Nordic hamstring exercises","authors":"Kristen Steudel , Nicos Haralabidis , Reed Gurchiek , Jennifer Hicks , Scott Delp","doi":"10.1016/j.jbiomech.2026.113236","DOIUrl":"10.1016/j.jbiomech.2026.113236","url":null,"abstract":"<div><div>Sprinting and the Nordic hamstring exercise (NHE) are common training modalities used to reduce hamstring injury risk, but the differences in the biomechanical demands of sprinting and the NHE are unclear. We conducted an exploratory analysis comparing knee and hip joint kinematics and kinetics, and biceps femoris long head (BFLH) muscle–tendon unit length and velocity during the flight phase of sprinting and the NHE. We collected motion capture and force data from fourteen athletic participants (8 males, 6 females) running (4–8 m/s) and performing the NHE. We used this experimental data and musculoskeletal modeling to compute joint kinematics and kinetics and estimate the BFLH muscle–tendon unit length and velocity for all running speeds and the NHE. Sprinting, for all speeds, puts the BFLH at longer lengths (<em>p</em> < 0.001) and higher lengthening velocities (<em>p</em> < 0.001) than the NHE. The NHE requires participants to generate peak knee flexion moments that are smaller than for running at 6 m/s and above (<em>p</em> < 0.001), and peak negative knee flexion powers that are less than 5% of all running speeds (<em>p</em> < 0.001). However, the duration of each NHE repetition is approximately 60 times longer than the BFLH lengthening portion of the flight phase of running, resulting in greater negative knee work for running at 6 m/s and below (<em>p</em> < 0.001) but less at 7.5 m/s and above (<em>p</em> < 0.001). The results of this study provide necessary quantitative information to compare the biomechanical demands of sprinting and the NHE.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113236"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387724","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

Kinetics of the trunk in association with the attenuation of upper body acceleration during walking 行走时躯干动力学与上半身加速度衰减的关系。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2026-05-01 Epub Date: 2026-03-03 DOI: 10.1016/j.jbiomech.2026.113235

Toru Sakuma, Kensaku Kimura

{"title":"Kinetics of the trunk in association with the attenuation of upper body acceleration during walking","authors":"Toru Sakuma, Kensaku Kimura","doi":"10.1016/j.jbiomech.2026.113235","DOIUrl":"10.1016/j.jbiomech.2026.113235","url":null,"abstract":"<div><div>The acceleration amplitude of body segments during walking is reduced from the ankle to the head. The primary function of shock absorption is performed by the legs, with the trunk also contributing. The aim of this study was to investigate the capability of the trunk to absorb shock during walking. Twenty healthy participants walked at their preferred and unnatural walk ratio (WR) (step length/cadence) at a constant speed. The unnatural WRs comprised 6 cadences (±10%, ±15%, and ± 20% of preferred cadence). Shock absorption was evaluated using the root mean square acceleration at the head (RMS<sub>H</sub>) and lower trunk (RMS<sub>T</sub>), the coefficient of attenuation from RMS<sub>T</sub> to RMS<sub>H</sub>, as well as the trunk joint torque and power. RMS<sub>H</sub> and RMS<sub>T</sub> in the anterior-posterior direction (AP) showed a significant increase (<em>p</em> < 0.05) in high WRs (slower cadence) and a significant decrease (<em>p</em> < 0.05) in low WRs (faster cadence) compared to the preferred WR. The attenuation coefficient in the AP was significantly decreased in high WRs than in the preferred WR (<em>p</em> < 0.05). The average negative power of the flexion–extension torque at the trunk joint had a significant negative correlation (<em>p</em> < 0.001) with RMS<sub>T</sub> in the AP. These results suggested that trunk flexion–extension torque played a role in the shock absorption, and this negative power increased in response to an increase in RMS<sub>T</sub> in the AP. However, given the limitation of the trunk’s shock absorption capacity, the RMS<sub>H</sub> in the AP was more pronounced at high WR.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"200 ","pages":"Article 113235"},"PeriodicalIF":2.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147365368","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