Journal of biomechanics最新文献_第7页

3D finite-element study for multi-frequency harmonic shear wave elastography: shear wave speed contrast assessment and experimental verification. 三维多频谐波横波弹性有限元研究：横波速度对比评估与实验验证。

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-09-01 Epub Date: 2025-07-30 DOI: 10.1016/j.jbiomech.2025.112886

Tuhin Roy, Elisa E Konofagou

{"title":"3D finite-element study for multi-frequency harmonic shear wave elastography: shear wave speed contrast assessment and experimental verification.","authors":"Tuhin Roy, Elisa E Konofagou","doi":"10.1016/j.jbiomech.2025.112886","DOIUrl":"10.1016/j.jbiomech.2025.112886","url":null,"abstract":"<p><p>Towards the characterization of viscoelasticity of the soft tissue, which is an important biomarker, this study aims to investigate the effectiveness of the Harmonic Shear Wave Elastography (HSWE) framework by analyzing the frequency-dependent phase velocity maps, using a 3D Finite-Element-based simulation framework. Here, we developed and verified a 3D finite-element framework to accurately model the tissue displacement under a multi-frequency HSWE setting. The HSWE results were compared using both simulation and phantom experiments against those from the Pulsed Shear Wave Elastography (PSWE) method which is widely used in shear wave elastography problems. Particularly, we analyzed the group and frequency-dependent phase velocities, focusing on the frequency range of 300 to 800 Hz. Additionally, we conducted parametric studies to examine the effects of inclusion size, stiffness, and viscosity. The HSWE framework provided accurate measurements of group and phase velocities, comparable to those obtained using the PSWE method. The median differences between HSWE and PSWE results were 5.21 % and 9.14 % for group and phase velocities, respectively, in simulations, and 13.98 % and 22.32 % for group and phase velocities, respectively, in phantom experiments. Parametric studies showed that the HSWE framework is effective in accurately characterizing the location, size, stiffness and viscoelastic properties of tissue inclusions, with notable improvements over PSWE, particularly for smaller inclusions at lower frequencies. Future work will focus on optimizing the HSWE framework for clinical use and developing inverse models to estimate the underlying viscoelastic shear moduli of the tissue to enhance its diagnostic capabilities.</p>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"190 ","pages":"112886"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12393163/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144799177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

More knee pain, less hip and ankle joint power: The relationship between knee osteoarthritis pain and joint power 膝关节疼痛多，髋关节和踝关节力量少：膝关节骨性关节炎疼痛与关节力量的关系

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-09-01 DOI: 10.1016/j.jbiomech.2025.112937

Daniel J. Currie, Dalia Grad, Kathryn Webster, Huaning Liu, Stacey Acker, Nikolas Knowles, Monica R. Maly

{"title":"More knee pain, less hip and ankle joint power: The relationship between knee osteoarthritis pain and joint power","authors":"Daniel J. Currie, Dalia Grad, Kathryn Webster, Huaning Liu, Stacey Acker, Nikolas Knowles, Monica R. Maly","doi":"10.1016/j.jbiomech.2025.112937","DOIUrl":"10.1016/j.jbiomech.2025.112937","url":null,"abstract":"<div><div>It is unknown how knee osteoarthritis pain affects joint power distribution while cycling. The study purposes were to (1) investigate if seat height, workload and any difference in hip or knee extensor strength affected asymmetry of hip, knee and ankle joint power during cycling; and (2) determine the relationship between knee osteoarthritis pain asymmetry and joint power asymmetry at the hips, knees, ankles and total leg. Asymmetry was the difference between dominant and non-dominant legs. Twenty-six participants (13 female, 13 male) with (n = 21) and without (n = 5) symptomatic knee osteoarthritis participated [age 64.3 (7.3) y, body mass index 27.0 (4.1) kg/m<sup>2</sup>]. Participants completed six cycling bouts at three seat heights (20°, 30°, 40° minimum knee flexion angle) and two workloads (40 W, 75 W) on a stationary bike. Self-reported pain was recorded for each knee before the first bout and after each bout. Three-dimensional kinematics and kinetics were collected synchronously with motion capture and instrumented pedals. A greater workload was associated with greater hip power asymmetry (p < 0.01); otherwise, seat height and workload did not affect power asymmetry (p > 0.05). Relationships were found between knee pain asymmetry and hip, ankle and total leg power asymmetry (p < 0.01), but not knee (p > 0.05). The hip, ankle and total leg with the more painful knee produced less power than the opposite side. The more painful knee cannot be assumed to produce less power than the contralateral side. These findings show that, at low workloads, clinicians can adjust seat height to patient preference without affecting joint power production during cycling.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"192 ","pages":"Article 112937"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145005081","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

Personalized musculoskeletal model based multi-muscle force analysis for amputees with transtibial prostheses 基于个性化肌肉骨骼模型的假肢截肢者多肌肉力分析

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-30 DOI: 10.1016/j.jbiomech.2025.112913

Yuwen Lu , Yan Huang , Wei Jin , Qining Wang

{"title":"Personalized musculoskeletal model based multi-muscle force analysis for amputees with transtibial prostheses","authors":"Yuwen Lu , Yan Huang , Wei Jin , Qining Wang","doi":"10.1016/j.jbiomech.2025.112913","DOIUrl":"10.1016/j.jbiomech.2025.112913","url":null,"abstract":"<div><div>Understanding the biomechanical effects of transtibial prostheses is essential for their optimization and for improving amputee mobility. This study investigated how different prostheses impact intra-limb muscle coordination and inter-limb muscle force symmetry using personalized musculoskeletal models based on the sDIMS platform. Five transtibial amputees participated in gait trials with passive prostheses and active prostheses under varying damping conditions. The results were compared to those of five able-bodied controls. Through multi-muscle force analysis, we quantified muscle force magnitudes, identified coordination patterns, and evaluated inter-limb symmetry of multiple lower limb muscles using correlation coefficients, cyclograms, and symmetry indices. The results revealed distinct compensatory strategies in the intact limb based on group-level analysis. Furthermore, personalized evaluation based on multi-muscle force analysis enabled effective assessment of different prosthesis configurations in a subject-specific manner. These findings suggest that the proposed framework can improve prosthetic parameter selection and support the development of personalized control strategies, offering practical guidance for transtibial prosthesis optimization.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"192 ","pages":"Article 112913"},"PeriodicalIF":2.4,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119048","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

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-30 DOI: 10.1016/j.jbiomech.2025.112934

Ethan G. Simaitis , Yujin Kwon , Jason R. Franz

{"title":"Age-related differences in the step-to-step control of foot placement during prolonged walking","authors":"Ethan G. Simaitis , Yujin Kwon , Jason R. Franz","doi":"10.1016/j.jbiomech.2025.112934","DOIUrl":"10.1016/j.jbiomech.2025.112934","url":null,"abstract":"<div><div>Walking is essential for maintaining independence and quality of life, yet aging may impair the neuromuscular function required for stable gait over time. This study sought to quantify age-related differences in step-to-step control during prolonged walking using detrended fluctuation analysis (DFA). We hypothesized that step-to-step changes in step length and step width would exhibit reduced temporal persistence over time, with more pronounced effects in older than in younger adults. 15 younger and 15 older adults walked on a treadmill at their preferred speed for 30 min. Kinematic data were used to calculate step length and step width across six consecutive 5-minute bins, from which DFA scaling exponents (α) were computed to characterize the temporal persistence of foot placement control. Younger adults exhibited clear adaptations over time, including the adoption of longer and narrower steps with reduced step width temporal persistence. In contrast, older adults showed relatively invariant step kinematics and DFA α-values over time. Younger adults may adjust their foot placement strategy over time to minimize energy cost and/or to accommodate fatigue. Conversely, our findings highlight a reduced capacity to adjust foot placement in older adults during prolonged walking, which may arise from diminished sensory feedback and may contribute to an increased risk of instability and falls. By revealing how the temporal structure of gait changes with age during prolonged walking, this work offers insight into the factors contributing to mobility decline and may inform interventions to support adaptive gait control.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"192 ","pages":"Article 112934"},"PeriodicalIF":2.4,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007836","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

Scapular kinematics and task specificity: The effect of load direction 肩胛骨运动学与任务特异性：载荷方向的影响

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-27 DOI: 10.1016/j.jbiomech.2025.112932

Erin C.S. Lee , Nathan M. Young , Rebekah L. Lawrence , Michael J. Rainbow

{"title":"Scapular kinematics and task specificity: The effect of load direction","authors":"Erin C.S. Lee , Nathan M. Young , Rebekah L. Lawrence , Michael J. Rainbow","doi":"10.1016/j.jbiomech.2025.112932","DOIUrl":"10.1016/j.jbiomech.2025.112932","url":null,"abstract":"<div><div>Our current understanding of healthy scapula motion is mainly based on studying the shoulder when it is generating an abduction torque against gravity. However, the shoulder can perform diverse tasks beyond abduction. In particular, little attention has been given to how scapula motion contributes to concentric adduction despite its involvement in high-demand tasks such as rock climbing and wheelchair transfers. Investigating scapular kinematics during concentrically loaded arm-lowering can provide insight into the mechanical demands underlying healthy scapula motion. In this study, we combined biplanar videoradiography and optical motion capture with a controllable cable machine to compare the three-dimensional humerothoracic, glenohumeral, and scapulothoracic kinematics between a weighted pull-down task (involving concentric shoulder adduction) and a weighted press-up task (involving concentric shoulder abduction) in ten healthy adults. We observed significantly more scapulothoracic upward rotation and less glenohumeral abduction during concentric adduction than concentric abduction. Our findings indicate that scapula upward rotation is not simply a function of overall humerothoracic elevation, but instead varies in a load-specific manner – potentially to orient the glenoid in a way that facilitates glenohumeral joint stability. We also observed substantial inter-individual variability in scapular kinematics within a task, and in how individuals responded to the different tasks. Our findings help provide a more well-rounded understanding of healthy scapular kinematics such that we can better identify and treat unhealthy motion (i.e., dyskinesis). Our findings can also inform musculoskeletal models that simulate scapulothoracic kinematics.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"191 ","pages":"Article 112932"},"PeriodicalIF":2.4,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917629","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 deep learning-based approach for measuring patellar cartilage deformations from knee MR images 基于深度学习的膝关节MR图像髌骨软骨变形测量方法

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-27 DOI: 10.1016/j.jbiomech.2025.112930

Jefferson R. Bercaw , Patrick X. Bradley , Christopher C. Otap , Lauren N. Heckelman , Krystal S. Tamayo , Kwadwo A. Owusu-Akyaw , Andrzej S. Kosinski , Roarke W. Horstmeyer , Charles E. Spritzer , Louis E. DeFrate

{"title":"A deep learning-based approach for measuring patellar cartilage deformations from knee MR images","authors":"Jefferson R. Bercaw , Patrick X. Bradley , Christopher C. Otap , Lauren N. Heckelman , Krystal S. Tamayo , Kwadwo A. Owusu-Akyaw , Andrzej S. Kosinski , Roarke W. Horstmeyer , Charles E. Spritzer , Louis E. DeFrate","doi":"10.1016/j.jbiomech.2025.112930","DOIUrl":"10.1016/j.jbiomech.2025.112930","url":null,"abstract":"<div><div>While knee osteoarthritis (OA) is a leading cause of disability in the United States, OA within the patellofemoral joint is understudied compared to the tibiofemoral joint. Mechanical alterations to cartilage may be among the first changes indicative of early OA. MR-based protocols have probed patellar cartilage mechanical function by measuring deformations in response to exercise. These studies, however, often rely on manual segmentation, which is time-intensive and may introduce variability. Therefore, our goals were (1) to develop convolutional neural networks to segment the patella and patellar cartilage from knee MR scans and (2) to evaluate the ability of these networks to measure exercise-induced cartilage deformations. Using a dataset of 109 knee MR scans, 2D and 3D U-Nets were developed and compared using the mean dice similarity coefficient (mDSC). Reliability of the best-performing networks was examined and the ability of these networks to detect patellar cartilage deformations following a hopping activity was evaluated. The 2D U-Net outperformed the 3D U-Net for both the patella (mDSC, 2D: 0.967 vs 3D: 0.960) and patellar cartilage (mDSC, 2D: 0.896 vs. 3D: 0.895). The 2D U-Nets demonstrated excellent reliability (ICC = 0.99, mean difference < 0.03 mm) in reproducing the mean patellar cartilage thickness across different days. Lastly, significant mean (mean ± standard deviation, 1.5 ± 1.8 %, P = 0.014) and maximum (10.6 ± 3.2 %, P < 0.001) patellar cartilage strains were detected following hopping. The autosegmentation tools developed herein provide a powerful framework for probing patellar cartilage mechanics in vivo.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"192 ","pages":"Article 112930"},"PeriodicalIF":2.4,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145007792","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 fluttering plaques on the pressure drop waveform of stenotic flow 颤振斑块对狭窄血流压降波形的影响

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-27 DOI: 10.1016/j.jbiomech.2025.112931

Donghyeon Jang, Woorak Choi

{"title":"Effects of fluttering plaques on the pressure drop waveform of stenotic flow","authors":"Donghyeon Jang, Woorak Choi","doi":"10.1016/j.jbiomech.2025.112931","DOIUrl":"10.1016/j.jbiomech.2025.112931","url":null,"abstract":"<div><div>The morphological vulnerability of atherosclerotic plaques, such as fluttering motion under pulsatile flow, poses diagnostic challenges in conventional fractional flow reserve (<em>FFR</em>) assessment. In this study, we investigate the hemodynamic impact of a fluttering plaque using a physical model of mild (40%) stenosis with and without an elastic plaque under stenotic flow. High-speed particle image velocimetry (<em>PIV</em>) and differential pressure measurements were employed to characterize flow patterns and pressure drop waveforms. While both models produced comparable time-averaged pressure drops, the Fluttering Plaque model exhibited extended recirculation zones, and elevated root-mean-square (<em>RMS</em>) fluctuations in pressure drop waveforms. The effects of the fluttering plaque on the distribution of turbulent kinetic energy (<em>TKE</em>) provides insight into the observed results. Our findings suggest that waveform-derived metrics, particularly the <em>RMS</em> amplitude of pressure drop fluctuations, may serve as novel hemodynamic indicators for detecting vulnerable plaques that remain undetected by time-averaged indices such as <em>FFR</em>.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"191 ","pages":"Article 112931"},"PeriodicalIF":2.4,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921737","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

Relationships between anterior cruciate ligament elastic and viscoelastic properties and cartilage degeneration in osteoarthritic human knee joints 骨关节炎患者膝关节前交叉韧带弹性和粘弹性与软骨退变的关系

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-25 DOI: 10.1016/j.jbiomech.2025.112929

Aapo Ristaniemi , Mikko A.J. Finnilä , Heikki Kröger , Rami K. Korhonen

{"title":"Relationships between anterior cruciate ligament elastic and viscoelastic properties and cartilage degeneration in osteoarthritic human knee joints","authors":"Aapo Ristaniemi , Mikko A.J. Finnilä , Heikki Kröger , Rami K. Korhonen","doi":"10.1016/j.jbiomech.2025.112929","DOIUrl":"10.1016/j.jbiomech.2025.112929","url":null,"abstract":"<div><div>Knee joint osteoarthritis (OA) is characterized by alterations in articular cartilage and subchondral bone, but concurrent biomechanical changes in the bundles of human anterior cruciate ligament are poorly known. This study aimed at characterizing the anteromedial (AM) and posterolateral (PL) bundles’ elastic and viscoelastic properties and relate them to knee joint OA.</div><div>Small dogbone-shaped samples were cut from mid-substance of AM and PL bundles of human knees (n = 18 knees, N = 9 cadavers) and subjected to tensile sinusoidal and multi-step stress-relaxation testing. Phase difference and dynamic modulus were analyzed from the sinusoidal test, and equilibrium Young’s modulus, peak-to-equilibrium stress ratio and fast and slow relaxation amplitudes and times were calculated to describe the elastic and viscoelastic properties. Cartilage degeneration was defined at eight sites in the knee joint by OARSI grading in our earlier study, and relationships between biomechanical properties and OARSI grades were investigated with Spearman’s rank correlation.</div><div>In the AM bundle, peak-to-equilibrium ratio increased (ρ = 0.525, <em>p</em> = 0.025), fast relaxation time decreased (ρ = -0.487, <em>p</em> = 0.040), and dynamic modulus decreased (ρ ≤ -0.501, <em>p</em> ≤ 0.034), with increasing OARSI grade of anterior medial femur. In both bundles, the phase difference increased (ρ ≥ 0.481, <em>p</em> ≤ 0.043) with OARSI grade of anterior medial femur.</div><div>The AM and PL bundles become more viscous (i.e. resist better rapid loads) with anterior medial femoral cartilage degeneration, while also the material stiffness of the AM bundle decreased (i.e. restricts anterior tibial translation more compliantly). It could be that cartilage degeneration leads to chronic underloading with intermittent rapid straining of the ACL, causing the observed adaptive response.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"191 ","pages":"Article 112929"},"PeriodicalIF":2.4,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925468","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

Biomechanics in end-stage knee osteoarthritis: Dynamic measures provide deeper insight than radiographic alignment during functional tasks 终末期膝关节骨关节炎的生物力学：动态测量在功能任务中提供比x线透视更深入的见解

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-23 DOI: 10.1016/j.jbiomech.2025.112928

Giovanni Spallone , Letizia Mancini , Arianna Carnevale , Stefano Campi , Emiliano Schena , Pieter D’Hooghe , Michael T. Hirschmann , Gianmarco Marcello , Carlo Casciaro , Rocco Papalia , Umile Giuseppe Longo

{"title":"Biomechanics in end-stage knee osteoarthritis: Dynamic measures provide deeper insight than radiographic alignment during functional tasks","authors":"Giovanni Spallone , Letizia Mancini , Arianna Carnevale , Stefano Campi , Emiliano Schena , Pieter D’Hooghe , Michael T. Hirschmann , Gianmarco Marcello , Carlo Casciaro , Rocco Papalia , Umile Giuseppe Longo","doi":"10.1016/j.jbiomech.2025.112928","DOIUrl":"10.1016/j.jbiomech.2025.112928","url":null,"abstract":"<div><div>Static radiographic alignment fails to capture the dynamic nature of joint behaviour during functional tasks. To address this, our study evaluated the relationship between Hip-Knee-Ankle angle (HKAA) and dynamic biomechanical variables (dynamic HKAA (dHKAA), via projection of hip, knee, and ankle joint centers onto the frontal plane, knee adduction moment (KAM), and knee abduction angle (KAA)), during gait and sit-to-stand tasks with and without arm assistance. A further objective was to examine the mediolateral center of pressure (COP ML) as a complementary parameter for assessing joint loading and frontal plane alignment. Twenty-two patients (mean age 67 ± 9 years, BMI 28.7 ± 3.4 kg/m<sup>2</sup>) with end-stage knee osteoarthritis scheduled for total knee arthroplasty were recruited. HKAA was extracted from full-length standing radiographs, while dynamic variables from 3D motion capture and force plates data. Associations between static and dynamic parameters were evaluated using correlation and linear regression analyses. dHKAA consistently exhibited stronger correlations with KAM and KAA than radiographic HKAA, particularly during gait loading response (ρ = 0.93; R<sup>2</sup> = 0.84, p < 0.01). Similar trends were observed in the other tasks, where HKAA showed limited associations. COP ML showed moderate correlations with KAM but none with dHKAA. These findings suggest that HKAA alone may not reliably capture functional joint loading, and that dHKAA provides a more comprehensive assessment of frontal plane knee behaviour. COP ML showed limited associations and should be cautiously interpreted in this context. These findings may enhance clinical assessments, surgical planning, and advancing-personalized, biomechanically driven intervention research.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"191 ","pages":"Article 112928"},"PeriodicalIF":2.4,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917628","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

Mechanical power for trail and mountain running — Introduction of a parametric model 越野和山地跑步用机械动力。参数化模型的介绍

IF 2.4 3区医学

Journal of biomechanics Pub Date : 2025-08-23 DOI: 10.1016/j.jbiomech.2025.112892

M. Holler , D. Jaén-Carrillo

{"title":"Mechanical power for trail and mountain running — Introduction of a parametric model","authors":"M. Holler , D. Jaén-Carrillo","doi":"10.1016/j.jbiomech.2025.112892","DOIUrl":"10.1016/j.jbiomech.2025.112892","url":null,"abstract":"<div><div>Here, we present a model for calculating the mechanical power delivered by the metabolism while running in alpine settings. The aim is to quantify power for various conditions in trail and mountain running, using data from modern consumer sports watches and complementary acceleration sensors. After extending an existing analytical model by including collision losses, speed-dependent elastic energy storage, a force-rate contribution, and an additional power component accounting for upper-body movement, we generalize it to running uphill and downhill. We introduce additional power components to account for the increased metabolic work required to run on uneven technical sections. On flat terrain and when assuming an elasticity coefficient as motivated from the literature, our approach predicts a comparable output between cycling and running for athletes similarly trained in both disciplines. As for running uphill and downhill, we obtain a very good agreement with the measured metabolic cost. This corresponds to the first time an algebraic model explains this inclination dependency. We evaluate our model using data from an exemplary trail run recorded with a standard consumer setup. This work provides a transparent, physics-based model grounded in scientific principles, offering an interpretable, reproducible, and adaptable framework for estimating mechanical power across diverse trail running conditions.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"191 ","pages":"Article 112892"},"PeriodicalIF":2.4,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903427","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