Journal of biomechanics最新文献

{"title":"Classification of first recovery steps after quiet standing following external perturbation from different directions","authors":"Thomas Chatagnon ,&nbsp;Anne-Hélène Olivier ,&nbsp;Ludovic Hoyet ,&nbsp;Julien Pettré ,&nbsp;Charles Pontonnier","doi":"10.1016/j.jbiomech.2025.112639","DOIUrl":"10.1016/j.jbiomech.2025.112639","url":null,"abstract":"<div><div>Recovery from external perturbations typically involves stepping, with the perturbation direction playing a key role in determining the recovery strategy. To date, classifications of these stepping strategies have relied on prior knowledge of perturbation direction, which is not always available when considering experimental paradigms close to real-world scenario. Here, we introduce a novel <em>Unified</em> classification method that enables the labeling of first recovery steps based solely on body kinematics. We have also developed and validated a logistic regression model that effectively differentiates between different recovery strategies.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"184 ","pages":"Article 112639"},"PeriodicalIF":2.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738587","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}

{"title":"Elastic modulus versus cell packing density in MDCK epithelial monolayers","authors":"Steven J. Chisolm ,&nbsp;Emily Guo ,&nbsp;Vignesh Subramaniam ,&nbsp;Kyle D. Schulze ,&nbsp;Thomas E. Angelini","doi":"10.1016/j.jbiomech.2025.112648","DOIUrl":"10.1016/j.jbiomech.2025.112648","url":null,"abstract":"<div><div>The elastic moduli of tissues are connected to their states of health and function. The epithelial monolayer is a simple, minimal, tissue model that is often used to gain understanding of mechanical behavior at the cellular or multi-cellular scale. Here we investigate how the elastic modulus of Madin Darby Canine Kidney (MDCK) cells depends on their packing density. Rather than measuring elasticity at the sub-cellular scale with local probes, we characterize the monolayer at the multi-cellular scale, as one would a thin slab of elastic material. We use a micro-indentation system to apply gentle forces to the apical side of MDCK monolayers, applying a normal force to approximately 100 cells in each experiment. In low-density confluent monolayers, we find that the elastic modulus decreases with increasing cell density. At high densities, the modulus appears to plateau. This finding will help guide our understanding of known collective behaviors in epithelial monolayers and other tissues where variations in cell packing density are correlated with cell motion.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"184 ","pages":"Article 112648"},"PeriodicalIF":2.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714265","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}

{"title":"Differences in countermovement jump landing characteristics and joint works across levels of perceived effort","authors":"Mia D. Hite,&nbsp;Anton J. Simms,&nbsp;Michael J. Stewart,&nbsp;Luke D. Chowning,&nbsp;John R. Harry","doi":"10.1016/j.jbiomech.2025.112645","DOIUrl":"10.1016/j.jbiomech.2025.112645","url":null,"abstract":"<div><div>The way in which different levels of effort affect countermovement jump (CMJ) landing characteristics and strategies remains unclear. The purpose of this study was to investigate differences in CMJ landing performance and related joint-level strategies across various levels of perceived effort. Twenty-four recreationally active individuals (12 Male: age = 23 ± 5 years, mass = 83.8 ± 14.5 kg, height = 1.8 ± 0.1 m; 12 Female: age = 23 ± 2 years, mass = 62.6 ± 12.0, height = 1.6 ± 0.1) performed five sets of three CMJs. Three-dimensional kinematic and ground reaction force (GRF) data were collected for each trial. Landing performance index (LPI), peak vGRF, and durations of the loading, attenuation, and control phases of the landing were obtained. Total lower body joint work (TW) as well as hip, knee and ankle contributions were calculated for 100 %, 75 %, 50 %, and 25 % perceived effort level for each phase of the landing. One-way repeated measures ANOVA tests (α = 0.05) were used to identify differences between each of the effort levels for all variables of interest. The best landing performances occurred during the 100 % condition, and while patterns in significant differences between levels of effort were not observed throughout all variables of interest, the TW during attenuation phase exhibited the most significant variability between levels of perceived effort. In addition, changes in the dependent variables did not coincide with proportional changes in level of effort. The results of the joint contributions suggest that levels of perceived effort may not stimulate desired changes in landing performance or joint mechanics.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"184 ","pages":"Article 112645"},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706364","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}

{"title":"Acute effects of soleus EMG biofeedback training on tibiofemoral joint contact forces in young healthy adults","authors":"Ellen Hellman ,&nbsp;Jari Arokoski ,&nbsp;Jason Franz ,&nbsp;Michael Skipper Andersen ,&nbsp;Rami Kristian Korhonen ,&nbsp;Lauri Stenroth","doi":"10.1016/j.jbiomech.2025.112646","DOIUrl":"10.1016/j.jbiomech.2025.112646","url":null,"abstract":"<div><div>Articular cartilage health depends on optimal joint loading. Both insufficient and excessive loading may lead to catabolic effects in cartilage, which contribute to the development of osteoarthritis. This study investigates the effects of real-time biofeedback from soleus muscle activity on tibiofemoral joint loading during walking. Specifically, we examine whether increased soleus activation can reduce compressive forces on the medial tibiofemoral compartment and lower the external knee adduction moment (KAM), which may help manage osteoarthritis. Thirteen healthy young adults completed a baseline walking trial on an instrumented treadmill, followed by biofeedback trials, where they were instructed to modify soleus activation by +20 %, +40 %, and −20 % using real-time electromyography (EMG) feedback. Marker trajectories, ground reaction forces, and EMG from the soleus muscle were measured during each trial. KAM was estimated with inverse dynamics, and tibiofemoral joint contact forces (JCF) were computed with static optimization informed by soleus EMG in OpenSim. A linear mixed-effect model was used to analyze the relationship between soleus activation and tibiofemoral JCFs. Participants significantly increased soleus muscle activation in +20 % (Δ% = 20.27 ± 17.87, p = 0.043) and +40 % (Δ% = 25.17 ± 26.64, p = 0.037) biofeedback trials but could not decrease it. A negative correlation was found between soleus activation and total (slope: −0.172, p &lt; 0.001), medial (slope: −0.077, p = 0.007), and lateral (slope: −0.266, p &lt; 0.001) JCFs, with interindividual differences observed. While increasing soleus activation reduced JCFs, it also significantly increased KAM (slope: 0.358, p &lt; 0.001). These findings show that soleus EMG biofeedback can be used to modify knee joint loading, but personalized approaches are needed.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"184 ","pages":"Article 112646"},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724115","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}

{"title":"Humeral axial rotation measurement through a proximal ulna marker cluster","authors":"Lorenzo De Sanctis ,&nbsp;Umile Giuseppe Longo ,&nbsp;Arianna Carnevale ,&nbsp;Minah Waraich ,&nbsp;Lawrence Vincent Gulotta ,&nbsp;Andreas Kontaxis","doi":"10.1016/j.jbiomech.2025.112643","DOIUrl":"10.1016/j.jbiomech.2025.112643","url":null,"abstract":"<div><div>Accurate measurement of internal/external rotation joint angle is critical in assessing the shoulder function, especially in the clinical practice as it plays a key role in evaluating activities of daily living and monitoring the rehabilitation progress. This study analyzed the effectiveness of using a marker cluster placed over the proximal epiphysis of the ulna to measure humeral axial rotation with respect to the thorax, comparing it with the traditional method that uses a cluster placed on the upper arm. Data were collected simultaneously using the proposed indirect approach and a conventional marker cluster to analyze three internal/external rotations performed in the Ski-Pose, frontal, and sagittal plane. Linear regressions for time series comparison reported a coefficient of determination <em>R</em>² &gt; 0.9919 in all tasks.<!--> <!-->The linear coefficients (a₁) were as follows: Ski-Pose (a₁ = 0.64 ± 0.10), frontal plane (a₁ = 0.74 ± 0.05), and sagittal plane (a₁ = 0.73 ± 0.04). Three additional planar tasks were recorded for concurrent validity and RMSE was reported for the main joint angle, obtaining a maximum of 3.87° for the pure flexion/extension task and 1.94° for the abduction/adduction task. A forearm pronation/supination task without axial rotation yielded a maximum error standard deviation of 2.64°. Proximal ulna tracking showed a statistically higher maximum range of motion than humeral tracking in pure axial rotation tasks. This indirect tracking approach is a promising alternative to the traditional cluster technique due to its reduced sensitivity to soft tissue artifacts.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"185 ","pages":"Article 112643"},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820763","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}

{"title":"Aerodynamic drafting in mass-start non-motorized sports: A systematic review","authors":"Fabien Beaumont,&nbsp;Sébastien Murer,&nbsp;Fabien Bogard,&nbsp;Guillaume Polidori","doi":"10.1016/j.jbiomech.2025.112641","DOIUrl":"10.1016/j.jbiomech.2025.112641","url":null,"abstract":"<div><div>Drafting is a key strategy in sports, allowing athletes to reduce air or water resistance by positioning behind a competitor. This review examines drafting’s influence on sports performance, especially its aerodynamic and hydrodynamic effects. Studies confirm drafting is highly effective in cycling, running, and swimming, where drag and energy demands are significantly reduced. In cycling, for instance, drafting within a peloton can cut drag by up to 95%, enhancing speed and endurance. In swimming, trailing a competitor similarly lowers water resistance. Other sports, like kayaking and race walking, show promise, though research remains limited. Methods used to study drafting include wind tunnel tests, computational fluid dynamics (CFD), and field observations. Interest in drafting has surged, with 60% of studies published in the last decade, highlighting its growing impact on competitive sports. The review underscores drafting’s varied benefits within sports, calling for more standardized guidelines.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"184 ","pages":"Article 112641"},"PeriodicalIF":2.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714264","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}

{"title":"Corrigendum to \"Biomechanical analysis of different back-supporting exoskeletons regarding musculoskeletal loading during lifting and holding\" [J. Biomech. 168 (2024) 112125].","authors":"J Johns, I Schultes, K Heinrich, W Potthast, U Glitsch","doi":"10.1016/j.jbiomech.2025.112624","DOIUrl":"https://doi.org/10.1016/j.jbiomech.2025.112624","url":null,"abstract":"","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":" ","pages":"112624"},"PeriodicalIF":2.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143691933","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}

{"title":"A novel method for brain aneurysms computed fluid dynamics analysis after flow diverter stent implantation based on micro-computed tomography reconstruction","authors":"Philippe Reymond,&nbsp;Gianmarco Bernava,&nbsp;Olivier Brina,&nbsp;Jeremy Hofmeister,&nbsp;Andrea Rosi,&nbsp;Karl-Olof Lövblad,&nbsp;Paolo Machi","doi":"10.1016/j.jbiomech.2025.112634","DOIUrl":"10.1016/j.jbiomech.2025.112634","url":null,"abstract":"<div><div>Flow diverter stents are now increasingly utilised in the management of cerebral aneurysms. Computed flow simulation can be used to assess flow reduction and anticipate treatment outcome. To achieve this, the stent must be deployed virtually in the parent vessel carrying the aneurysm before running the simulation. This study proposes an alternative method to virtual deployment using micro-computer tomography after <em>in vitro</em> deployment of stents in silicone models to reconstruct accurately the struts over the aneurysm neck. Two experienced neuroradiologists deployed different stents (four 48-wire and one 64-wire pipeline embolization devices) in identical silicone models. Micro-CT acquisition was then carried out and allowed to reconstruct the stent meshes very accurately using different pre-processing steps. Virtual deployments were also performed for the two types of stents. Qualitatively, it was shown that the real deployments formed an inhomogeneous wire network compared to the regularity of the mesh of the virtually deployed stents. This difference had a moderate influence on hemodynamics. For virtual deployment, we observed an overestimation of the flow reduction of 5% and 16% for the 64- and 48-wire stents, respectively. While the flow patterns remained the same for the 48-wire stent, the 64-wire stent showed an inversion of the intra-aneurysmal vortex. This promising method could be used in the development of flow diverter devices or to conduct a comparative evaluation between different devices.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"186 ","pages":"Article 112634"},"PeriodicalIF":2.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859484","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}

{"title":"Assessing breast acceleration while using sports bras and conventional bras: A comparative analysis of measurement techniques","authors":"Saba Yazdekhasti,&nbsp;Emily C. LaVoy,&nbsp;Stacey L. Gorniak","doi":"10.1016/j.jbiomech.2025.112640","DOIUrl":"10.1016/j.jbiomech.2025.112640","url":null,"abstract":"<div><div>This study investigates breast biomechanics during physical activities, aiming to evaluate the magnitude of breast tissue acceleration using different modalities.We aim to compare existing methodologies for evaluating breast movement by comparing acceleration data derived from 3D motion capture marker displacement of the nipple-region and triaxial accelerometry data collected from multiple breast regions. Twenty female participants, with cup sizes ranging from D to H, engaged in a series of physical tasks while wearing different types of support, ranging from conventional everyday bras to sports bras designed for full-busted women. Triaxial accelerometers consistently indicated higher acceleration magnitudes, potentially due to their ability to detect localized movements that 3D motion capture may smooth out during data post-processing. Our findings suggest that when breasts are well-supported by a sports bra, external triaxial accelerometry markers accurately reflect breast tissue acceleration. This reinforces the reliability of sports bras in ensuring uniform support and highlights the need for standardized breast biomechanics measurement protocols. The findings of this study may be used to help optimize sports bra design as well as the refining of breast biomechanics measurement methodologies in women with larger bra sizes.</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"183 ","pages":"Article 112640"},"PeriodicalIF":2.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680116","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}

{"title":"Hyperelastic meniscal material characterization via inverse parameter identification for knee arthroscopic simulations","authors":"Bismi Rasheed ,&nbsp;Øystein Bjelland ,&nbsp;Andreas F. Dalen ,&nbsp;Hans Georg Schaathun","doi":"10.1016/j.jbiomech.2025.112627","DOIUrl":"10.1016/j.jbiomech.2025.112627","url":null,"abstract":"<div><div>Understanding the complex behavior of menisci is of growing interest in many fields including sports medicine, surgical simulation, and implant design. The selection of an appropriate material model and accurate model parameters contribute to identifying the degree of degeneration of the meniscus. Incorporating patient-specific material parameters could further improve the safe handling of tissue during probing in knee arthroscopy simulations, supporting more informed intraoperative decision-making. The objective of this study is to identify hyperelastic material parameters of individual human menisci based on an inverse parameter identification approach using optimization and demonstrate a real-time interactive surgical simulation using identified parameters. Mechanical tests were conducted in indentation of the anterior, mid-body, and posterior regions of five lateral and medial menisci to obtain experimental force–displacement data. An inverse parameter identification based on these tests and finite element (FE) models was employed to minimize the differences between the experimental and simulated force. The region-specific FE models considered the predominant collagen fiber orientation of the meniscus. Anisotropic hyperelastic material parameters were optimized using a particle swarm optimization algorithm. Finally, the optimized parameters were used in simulation open framework architecture (SOFA) and demonstrated a real-time probe-meniscus interaction during the arthroscopic meniscus examination. The optimized values revealed subject-specific characteristics, along with anatomical and regional variations, with high shear modulus observed in the anterior region of the medial meniscus (0.76 ± 0.28 MPa for 1 mm indentation). Additionally, an increase in shear modulus was observed with increased indentation depth (<span><math><mrow><mi>p</mi><mo>&lt;</mo><mn>0</mn><mo>.</mo><mn>05</mn></mrow></math></span> except for the mid-body of the medial meniscus).</div></div>","PeriodicalId":15168,"journal":{"name":"Journal of biomechanics","volume":"183 ","pages":"Article 112627"},"PeriodicalIF":2.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143674041","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}