Journal of Applied Biomechanics最新文献_第10页

A Statistical Parametric Mapping Analysis Approach for the Evaluation of a Passive Back Support Exoskeleton on Mechanical Loading During a Simulated Patient Transfer Task. 在模拟病人转移任务中评估被动背支撑外骨骼机械负荷的统计参数映射分析方法。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0126

Unai Latorre Erezuma, Maialen Zelaia Amilibia, Ander Espin Elorza, Camilo Cortés, Jon Irazusta, Ana Rodriguez-Larrad

{"title":"A Statistical Parametric Mapping Analysis Approach for the Evaluation of a Passive Back Support Exoskeleton on Mechanical Loading During a Simulated Patient Transfer Task.","authors":"Unai Latorre Erezuma, Maialen Zelaia Amilibia, Ander Espin Elorza, Camilo Cortés, Jon Irazusta, Ana Rodriguez-Larrad","doi":"10.1123/jab.2022-0126","DOIUrl":"https://doi.org/10.1123/jab.2022-0126","url":null,"abstract":"This study assessed the effectiveness of a passive back support exoskeleton during a mechanical loading task. Fifteen healthy participants performed a simulated patient transfer task while wearing the Laevo (version 2.5) passive back support exoskeleton. Collected metrics encompassed L5-S1 joint moments, back and abdominal muscle activity, lower body and back kinematics, center of mass displacement, and movement smoothness. A statistical parametric mapping analysis approach was used to overcome limitations from discretization of continuous data. The exoskeleton reduced L5-S1 joint moments during trunk flexion, but wearing the device restricted L5-S1 joint flexion when flexing the trunk as well as hip and knee extension, preventing participants from standing fully upright. Moreover, wearing the device limited center of mass motion in the caudal direction and increased its motion in the anterior direction. Therefore, wearing the exoskeleton partly reduced lower back moments during the lowering phase of the patient transfer task, but there were some undesired effects such as altered joint kinematics and center of mass displacement. Statistical parametric mapping analysis was useful in determining the benefits and hindrances produced by wearing the exoskeleton while performing the simulated patient transfer task and should be utilized in further studies to inform design and appropriate usage.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"22-33"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10589363","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: 1

Left-Right Differential Erector Spinae Muscles Activation in Prone and Quadruped Positions. 俯卧位和四足位的左右差异竖脊肌激活。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2023-02-01 DOI: 10.1123/jab.2022-0047

Nader Farahpour, Mahboube Alemzadeh, Mehri Mohammadi, Mohammadreza Rezaie, Paul Allard

{"title":"Left-Right Differential Erector Spinae Muscles Activation in Prone and Quadruped Positions.","authors":"Nader Farahpour, Mahboube Alemzadeh, Mehri Mohammadi, Mohammadreza Rezaie, Paul Allard","doi":"10.1123/jab.2022-0047","DOIUrl":"https://doi.org/10.1123/jab.2022-0047","url":null,"abstract":"Left-right differential erector spinae (ES) muscle strengthening is required to correct ES muscle imbalances. The objective was to test the effect of 6 body positions on the differential activation of the ES muscles. In 14 able-bodied young women, using a surface electromyography system, the bilateral ES muscles activity at the third lumbar (ESL3) and the 10th (EST10) and 6th (EST6) thoracic vertebral levels was measured with the contralateral arm and leg lifted in the prone and quadruped conditions and with a single arm lifted in the quadruped position. Results showed that the activity of the ESL3 was symmetrical (P > .05) and significantly smaller than that of the thoracic ES muscles in all body positions (P < .01). The EST10 and EST6 were differentially activated in all tests (P < .001). Besides, the differential activation was higher in the contralateral-arm and -leg lift in the quadruped position than in the other positions. In conclusion, contralateral-arm and -leg lift and single-arm lift in the quadruped and prone positions are capable of differentially activating the ES muscles on one side more than the other side. Further studies are recommended to examine the effectiveness of these exercises on the correction of ES muscle imbalances in clinical populations.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"54-61"},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10582654","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 Effects of Increasing Trunk Flexion During Stair Ascent on the Rate and Magnitude of Achilles Tendon Force in Asymptomatic Females. 无症状女性上楼梯时增加躯干屈曲对跟腱力的速率和大小的影响。

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2022-12-15 Print Date: 2023-02-01 DOI: 10.1123/jab.2022-0165

Lee T Atkins, Michael Lowrey, Sarah Reagor, Kirsten Walker, Dhalston Cage

{"title":"The Effects of Increasing Trunk Flexion During Stair Ascent on the Rate and Magnitude of Achilles Tendon Force in Asymptomatic Females.","authors":"Lee T Atkins, Michael Lowrey, Sarah Reagor, Kirsten Walker, Dhalston Cage","doi":"10.1123/jab.2022-0165","DOIUrl":"10.1123/jab.2022-0165","url":null,"abstract":"Research indicates that increasing trunk flexion may optimize patellofemoral joint loading. However, this postural change could cause an excessive Achilles tendon force (ATF) and injury risk during movement. This study aimed to examine the effects of increasing trunk flexion during stair ascent on ATF, ankle biomechanics, and vertical ground reaction force in females. Twenty asymptomatic females (age: 23.4 [2.5] y; height: 1.6 [0.8] m; mass: 63.0 [12.2] kg) ascended stairs using their self-selected and flexed trunk postures. Compared with the self-selected trunk condition, decreases were observed for peak ATF (mean differences [MD] = 0.14 N/kg; 95% confidence interval [CI], 0.06 to 0.23; Cohen d = -1.2; P = .003), average rate of ATF development (MD = 0.25 N/kg/s; 95% CI, 0.07 to 0.43; Cohen d = -0.9; P = .010), ankle plantar flexion moment (MD = 0.08 N·m/kg; 95% CI, 0.03 to 0.13; Cohen d = -1.1; P = .005), and vertical ground reaction force (MD = 38.6 N/kg; 95% CI, 20.3 to 56.90; Cohen d = -1.8; P < .001). Increasing trunk flexion did not increase ATF. Instead, this postural change was associated with a decreased ATF rate and magnitude and may benefit individuals with painful Achilles tendinopathy.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"39 1","pages":"10-14"},"PeriodicalIF":1.1,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10588312","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

Differences in Knee Extensors' Muscle-Tendon Unit Passive Stiffness, Architecture, and Force Production in Competitive Cyclists Versus Runners. 在竞技自行车运动员和跑步运动员中，膝关节伸肌-肌腱单元被动刚度、结构和力量产生的差异。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-11-16 Print Date: 2022-12-01 DOI: 10.1123/jab.2022-0072

Leonardo Cesanelli, Sigitas Kamandulis, Nerijus Eimantas, Danguole Satkunskiene

{"title":"Differences in Knee Extensors' Muscle-Tendon Unit Passive Stiffness, Architecture, and Force Production in Competitive Cyclists Versus Runners.","authors":"Leonardo Cesanelli, Sigitas Kamandulis, Nerijus Eimantas, Danguole Satkunskiene","doi":"10.1123/jab.2022-0072","DOIUrl":"https://doi.org/10.1123/jab.2022-0072","url":null,"abstract":"To describe the possible effects of chronic specific exercise training, the present study compared the anthropometric variables, muscle-tendon unit (MTU) architecture, passive stiffness, and force production capacity between a group of competitive cyclists and runners. Twenty-seven competitive male cyclists (n = 16) and runners (n = 11) participated. B-mode ultrasound evaluation of the vastus lateralis muscle and patellar tendon as well as passive stiffness of the knee extensors MTU were assessed. The athletes then performed a test of knee extensor maximal voluntary isometric contractions. Cyclists displayed greater thigh girths, vastus lateralis pennation angle and muscle thickness, patellar tendon cross-sectional area, and MTU passive stiffness than runners (P < .05). Knee extensor force production capacity also differed significantly, with cyclists showing greater values compared with runners (P < .05). Overall, the direct comparison of these 2 populations revealed specific differences in the MTU, conceivably related to the chronic requirements imposed through the training for the different disciplines.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"412-423"},"PeriodicalIF":1.4,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40482911","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

Alterations in the Functional Knee Alignment Are Not an Effective Strategy to Modify the Mediolateral Distribution of Knee Forces During Closed Kinetic Chain Exercises. 在闭式运动链练习中，改变功能性膝关节对齐并不是改变膝关节力量中外侧分布的有效策略。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-11-16 Print Date: 2022-12-01 DOI: 10.1123/jab.2021-0310

Will Bosch, Amir Esrafilian, Paavo Vartiainen, Jari Arokoski, Rami K Korhonen, Lauri Stenroth

{"title":"Alterations in the Functional Knee Alignment Are Not an Effective Strategy to Modify the Mediolateral Distribution of Knee Forces During Closed Kinetic Chain Exercises.","authors":"Will Bosch, Amir Esrafilian, Paavo Vartiainen, Jari Arokoski, Rami K Korhonen, Lauri Stenroth","doi":"10.1123/jab.2021-0310","DOIUrl":"https://doi.org/10.1123/jab.2021-0310","url":null,"abstract":"Pain felt while performing rehabilitation exercises could be a reason for the low adherence of knee osteoarthritis patients to physical rehabilitation. Reducing compressive forces on the most affected knee regions may help to mitigate the pain. Knee frontal plane positioning with respect to pelvis and foot (functional knee alignment) has been shown to modify the mediolateral distribution of the tibiofemoral joint contact force in walking. Hence, different functional knee alignments could be potentially used to modify joint loading during rehabilitation exercises. The aim was to understand whether utilizing different alignments is an effective strategy to unload specific knee areas while performing rehabilitation exercises. Eight healthy volunteers performed 5 exercises with neutral, medial, and lateral knee alignment. A musculoskeletal model was modified for improved prediction of tibiofemoral contact forces and used to evaluate knee joint kinematics, moments, and contact forces. Functional knee alignment had only a small and inconsistent effect on the mediolateral distribution joint contact force. Moreover, the magnitude of tibiofemoral and patellofemoral contact forces, knee moments, and measured muscle activities was not significantly affected by the alignment. Our results suggest that altering the functional knee alignment is not an effective strategy to unload specific knee regions in physical rehabilitation.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"424-433"},"PeriodicalIF":1.4,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40482912","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

Relationship Between Shoulder Pain and Joint Reaction Forces and Muscle Moments During 2 Speeds of Wheelchair Propulsion. 两种轮椅推进速度下肩痛与关节反作用力及肌肉力矩的关系

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-11-11 Print Date: 2022-12-01 DOI: 10.1123/jab.2022-0066

Li-Shan Chang, Xiong-Wen Ke, Weerawat Limroongreungrat, Yong Tai Wang

{"title":"Relationship Between Shoulder Pain and Joint Reaction Forces and Muscle Moments During 2 Speeds of Wheelchair Propulsion.","authors":"Li-Shan Chang, Xiong-Wen Ke, Weerawat Limroongreungrat, Yong Tai Wang","doi":"10.1123/jab.2022-0066","DOIUrl":"https://doi.org/10.1123/jab.2022-0066","url":null,"abstract":"The purpose of this study was to determine shoulder joint reaction forces and muscle moments during 2 speeds (1.3 and 2.2 m/s) of wheelchair propulsion and to investigate the relationship between joints reaction forces, muscle moments, and shoulder pain. The measurements were obtained from 20 manual wheelchair users. A JR3 6-channel load sensor (±1% error) and a Qualisys system were used to record 3-dimensional pushrim kinetics and kinematics. A 3-dimensional inverse dynamic model was generated to compute joint kinetics. The results demonstrated significant differences in shoulder joint forces and moments (P < .01) between the 2 speeds of wheelchair propulsion. The greatest peak shoulder joint forces during the drive phase were anterior directed (Fy, 184.69 N), and the greatest joint moment was the shoulder flexion direction (flexion moment, 35.79 N·m) at 2.2 m/s. All the shoulder joint reaction forces and flexion moment were significantly (P < .05) related to shoulder pain index. The forces combined in superior and anterior direction found at the shoulder joint may contribute to the compression of subacromial structure and predispose manual wheelchair users to potential rotator cuff impingement syndrome.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"404-411"},"PeriodicalIF":1.4,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40486119","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

Weighted Vest Loads Do Not Elicit Changes in Spatial-Temporal Gait Parameters in Children and Adolescents With Autism. 加权背心负荷不会引起自闭症儿童和青少年时空步态参数的变化。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-11-02 Print Date: 2022-12-01 DOI: 10.1123/jab.2021-0241

Alyssa N Olivas, Emily A Chavez, Jeffrey D Eggleston

{"title":"Weighted Vest Loads Do Not Elicit Changes in Spatial-Temporal Gait Parameters in Children and Adolescents With Autism.","authors":"Alyssa N Olivas, Emily A Chavez, Jeffrey D Eggleston","doi":"10.1123/jab.2021-0241","DOIUrl":"https://doi.org/10.1123/jab.2021-0241","url":null,"abstract":"Weighted vests have been used primarily as behavioral interventions for children and adolescents with autism. Contemporary research has begun to examine weighted vest effects on movement. Previous research in children with neurotypical development revealed 15% body mass loads modified spatial-temporal gait characteristics; however, a value applicable to children and adolescents with autism has not been established. The purpose of this study was to establish an appropriate mass value by examining spatial-temporal gait parameters in children and adolescents with autism with various loads in a weighted vest. Nine children and adolescents with autism, aged 8-17, walked without a weighted vest, with 5%, 10%, 15%, and 20% body mass while spatial-temporal data were captured. Repeated-measures analysis of variance (α = .05) were conducted among conditions for each variable, with a Holm-Bonferroni method correction. Analysis revealed significant decreases in right step length, but no differences in stride width, left step length, double-limb support time, or stride velocity were observed. Due to insignificant findings, an appropriate mass value could not be determined for weighted vests for children with autism. However, unchanged spatial-temporal gait parameters with increasing loads could be clinically relevant as weighted vest loads of 10% are typically used for behavioral interventions.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"391-397"},"PeriodicalIF":1.4,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40676785","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: 1

Differences in Muscle Demand and Joint Contact Forces Between Running and Skipping. 跑步和跳绳之间肌肉需求和关节接触力的差异。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-10-20 Print Date: 2022-12-01 DOI: 10.1123/jab.2022-0011

Sarah A Roelker, Paul DeVita, John D Willson, Richard R Neptune

{"title":"Differences in Muscle Demand and Joint Contact Forces Between Running and Skipping.","authors":"Sarah A Roelker, Paul DeVita, John D Willson, Richard R Neptune","doi":"10.1123/jab.2022-0011","DOIUrl":"https://doi.org/10.1123/jab.2022-0011","url":null,"abstract":"Skipping has been proposed as a viable cross-training exercise to running due to its lower knee contact forces and higher whole-body energy expenditure. However, how individual muscle forces, energy expenditure, and joint loading are affected by differences in running and skipping mechanics remains unclear. The purpose of this study was to compare individual muscle forces, energy expenditure, and lower extremity joint contact forces between running and skipping using musculoskeletal modeling and simulations of young adults (n = 5) performing running and skipping at 2.5 m·s-1 on an instrumented treadmill. In agreement with previous work, running had greater knee and patella contact forces than skipping which was accompanied by greater knee extensor energetic demand. Conversely, skipping had greater ankle contact forces and required greater energetic demand from the uniarticular ankle plantarflexors. There were no differences in hip contact forces between gaits. These findings further support skipping as a viable alternative to running if the primary goal is to reduce joint loading at the commonly injured patellofemoral joint. However, for those with ankle injuries, skipping may not be a viable alternative due to the increased ankle loads. These findings may help clinicians prescribe activities most appropriate for a patient's individual training or rehabilitation goals.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"382-390"},"PeriodicalIF":1.4,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40560204","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: 1

Mechanisms of Achilles Tendon Rupture in National Basketball Association Players. nba球员跟腱断裂的机制。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-10-20 Print Date: 2022-12-01 DOI: 10.1123/jab.2022-0088

Adam J Petway, Matthew J Jordan, Scott Epsley, Philip Anloague

{"title":"Mechanisms of Achilles Tendon Rupture in National Basketball Association Players.","authors":"Adam J Petway, Matthew J Jordan, Scott Epsley, Philip Anloague","doi":"10.1123/jab.2022-0088","DOIUrl":"https://doi.org/10.1123/jab.2022-0088","url":null,"abstract":"A systematic search was performed of online databases for any Achilles tendon (AT) injuries occurring within the National Basketball Association (NBA). Video was obtained of injuries occurring during competition and downloaded for analysis in Dartfish. NBA athletes (n = 27) were identified with AT rupture over a 30-year period (1991-2021). Of the 27 NBA athletes found to have AT ruptures (mean age: 29.3 [3.3] y; average time in the NBA: 8.5 [3.8] y), 15 in-game videos were obtained for analysis. Noncontact rupture was presumed to have occurred in 12/13 cases. Eight of the 13 athletes had possession of the ball during time of injury. The ankle joint of the injured limb for all 13 athletes was in a dorsiflexed position during the time of injury (47.9° [6.5°]). All 13 athletes performed a false-step mechanism at time of injury where they initiated the movement by taking a rearward step posterior to their center of mass with the injured limb before translating forward. NBA basketball players that suffered AT ruptures appeared to present with a distinct sequence of events, including initiating a false step with ankle dorsiflexion of the injured limb at the time of injury.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 6","pages":"398-403"},"PeriodicalIF":1.4,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40560205","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

Methods of Estimating Foot Power and Work in Standing Vertical Jump. 立定直跳中足部力量及功的估算方法。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-10-01 DOI: 10.1123/jab.2021-0254

Kundan Joshi, Blake M Ashby

{"title":"Methods of Estimating Foot Power and Work in Standing Vertical Jump.","authors":"Kundan Joshi, Blake M Ashby","doi":"10.1123/jab.2021-0254","DOIUrl":"https://doi.org/10.1123/jab.2021-0254","url":null,"abstract":"Experimental motion capture studies have commonly considered the foot as a single rigid body even though the foot contains 26 bones and 30 joints. Various methods have been applied to study rigid body deviations of the foot. This study compared 3 methods: distal foot power (DFP), foot power imbalance (FPI), and a 2-segment foot model to study foot power and work in the takeoff phase of standing vertical jumps. Six physically active participants each performed 6 standing vertical jumps from a starting position spanning 2 adjacent force platforms to allow ground reaction forces acting on the foot to be divided at the metatarsophalangeal (MTP) joints. Shortly after movement initiation, DFP showed a power absorption phase followed by a power generation phase. FPI followed a similar pattern with smaller power absorption and a larger power generation compared to DFP. MTP joints primarily generated power in the 2-segment model. The net foot work was -4.0 (1.0) J using DFP, 1.8 (1.1) J using FPI, and 5.1 (0.5) J with MTP. The results suggest that MTP joints are only 1 source of foot power and that differences between DFP and FPI should be further explored in jumping and other movements.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 5","pages":"293-300"},"PeriodicalIF":1.4,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10798023","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