Journal of Applied Biomechanics最新文献

Three Months of Wearing an Ankle Foot Orthosis Improves the Spatiotemporal Gait Characteristics in Patients With Peripheral Artery Disease.

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-03-04 DOI: 10.1123/jab.2024-0083

Farahnaz Fallahtafti, Kaeli Samson, Seyedeh Zahra Salamifar, Jason Johanning, Iraklis Pipinos, Sara A Myers

{"title":"Three Months of Wearing an Ankle Foot Orthosis Improves the Spatiotemporal Gait Characteristics in Patients With Peripheral Artery Disease.","authors":"Farahnaz Fallahtafti, Kaeli Samson, Seyedeh Zahra Salamifar, Jason Johanning, Iraklis Pipinos, Sara A Myers","doi":"10.1123/jab.2024-0083","DOIUrl":"https://doi.org/10.1123/jab.2024-0083","url":null,"abstract":"Patients with peripheral artery disease (PAD) often experience leg muscle damage, leading to noticeable walking difficulties. Using ankle foot orthosis (AFO) may enhance gait by supporting weak muscles. This study examined whether wearing AFOs improved the spatiotemporal gait characteristics of patients with PAD to be closer to those of healthy individuals, both from its first use and after a 3-month intervention. Spatiotemporal parameters were calculated from the kinematics of 26 patients with PAD captured in a biomechanics lab. Subjects walked with and without AFOs before and following a 3-month AFO intervention on a crossover basis. The immediate intervention group wore AFOs for 3 months (intervention) before switching to their control shoes (control), while the delayed intervention group followed the reverse sequence. Means and standard deviations (variability) for step width, length, time, and velocity were compared using separate linear repeated measures models. The models included group (immediate vs delayed intervention), time (before vs after intervention or baseline vs 3 mo), and condition (non-AFO vs AFO) as factors of comparison, in addition to interactions, if significant. A 3-month AFO intervention enhanced the temporal gait parameters and reduced gait variability. The mean and variability of temporal gait parameters were sensitive enough to determine whether patients walked more like healthy individuals after a 3-month AFO intervention. This may decrease fall risk and promote more efficient walking patterns in patients with PAD. The long-term benefits and adherence to AFOs and other assistive devices need further study.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-7"},"PeriodicalIF":1.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568877","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

Combining an Internal Attentional Focus With Mirror Motor Observation Enhances Mechanical Output During Isokinetic Leg-Extension Exercise.

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-02-25 DOI: 10.1123/jab.2024-0187

Goncalo V Mendonca, Jorge Carvalho, João Matos, Paulo Santos, Brad J Schoenfeld, Pedro Pezarat-Correia

{"title":"Combining an Internal Attentional Focus With Mirror Motor Observation Enhances Mechanical Output During Isokinetic Leg-Extension Exercise.","authors":"Goncalo V Mendonca, Jorge Carvalho, João Matos, Paulo Santos, Brad J Schoenfeld, Pedro Pezarat-Correia","doi":"10.1123/jab.2024-0187","DOIUrl":"https://doi.org/10.1123/jab.2024-0187","url":null,"abstract":"When carrying out a motor task, the direction of the performer's attentional focus can affect mechanical output and muscle activation. Cortical excitability increases with the observation of motor skills. However, it is unknown if this effect can be additive to that resulting from an internal attentional focus during resistance exercise. A crossover-study design was employed to examine the acute effects of combining mirror self-motor observation (MO) and internally focused verbal instructions on mechanical output and muscle activation during isokinetic concentric knee-extension exercise. Ten participants were tested in 2 different conditions: verbal alone and verbal + MO-mirror. The combination of verbal + MO-mirror attenuated the decrease in torque output in response to 6 sets of 10 isokinetic contractions (P = .043). Interestingly, this effect was paired by a lower-level antagonist/agonist coactivation with the verbal + MO-mirror condition (P = .031). No other differences between conditions were noted. Taken together, these results suggest that the combination of both cueing modalities elicits a more effective contraction strategy during knee-extension exercise. Ultimately, this provides preliminary evidence of better motor performance and heightened fatigue resistance in response to isokinetic exercise.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-8"},"PeriodicalIF":1.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Influence of Forward Trunk Lean During Single-Limb Landing on Achilles Tendon Force in Physically Active Females.

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-02-24 DOI: 10.1123/jab.2024-0173

Lee T Atkins, Hyung Suk Yang, Vaishnavi Chiddarwar, C Roger James

{"title":"The Influence of Forward Trunk Lean During Single-Limb Landing on Achilles Tendon Force in Physically Active Females.","authors":"Lee T Atkins, Hyung Suk Yang, Vaishnavi Chiddarwar, C Roger James","doi":"10.1123/jab.2024-0173","DOIUrl":"https://doi.org/10.1123/jab.2024-0173","url":null,"abstract":"It is unknown if forward trunk lean during single-limb landing influences the Achilles tendon force (ATF). This study examined the effect of forward trunk lean during single-limb landing on the ATF in physically active females. Thirty physically active females (23.7 [3.6] y) performed 5 landing trials (0.25 m) using self-selected and forward trunk lean strategies. Dependent variables included peak ATF; average ATF development rate; and sagittal trunk, hip, knee, and ankle angles and moments at the time of peak ATF. The increased forward trunk lean (mean difference (MD) = 14.1°; 95% CI, 11.0 to 17.2; P < .001) caused a decrease in peak ATF (MD = -3.5 N/kg; 95% CI, -5.8 to -1.2; P = .004) and ankle plantar flexion moment (MD = -0.2 N·m/kg; 95% CI, -0.4 to -0.1; P = .002). In contrast, forward trunk lean resulted in greater hip (MD = 15.2°; 95% CI, 11.9 to 18.4; P < .001) and knee flexion (MD = 7.7°; 95% CI , 4.7 to 10.7; P < .001) angles, and hip extension moment (MD = 0.3 N·m/kg; 95% CI, 0.1 to 0.5; P = .002). Forward trunk lean changes predicted peak ATF changes (r = .33, P = .04). Sagittal trunk posture influences the ATF in physically active females during single-limb landing and may effectively alter loading in patients recovering from Achilles tendinopathy.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-7"},"PeriodicalIF":1.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143494967","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

Erratum. Muscle Torque-Velocity Relationships and Fatigue With Reduced Knee Joint Range of Motion in Young and Older Adults.

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-02-24 DOI: 10.1123/jab.2025-0045

引用次数: 0

Repeatability of Vertical Ground Reaction Force Estimation During Running on the Athletics Track on 3 Different Days. 3 个不同日期在田径跑道上跑步时垂直地面反作用力估算的重复性。

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-02-20 DOI: 10.1123/jab.2024-0126

Bouke L Scheltinga, Jaap H Buurke, Joost N Kok, Jasper Reenalda

{"title":"Repeatability of Vertical Ground Reaction Force Estimation During Running on the Athletics Track on 3 Different Days.","authors":"Bouke L Scheltinga, Jaap H Buurke, Joost N Kok, Jasper Reenalda","doi":"10.1123/jab.2024-0126","DOIUrl":"https://doi.org/10.1123/jab.2024-0126","url":null,"abstract":"To increase understanding in development of running injuries, the biomechanical load over time should be studied. Ground reaction force (GRF) is an important parameter for biomechanical analyses and is typically measured in a controlled lab environment. GRF can be estimated outdoors, however, the repeatability of this estimation is unknown. Repeatability is a crucial aspect if a measurement is repeated over prolonged periods of time. This study investigates the repeatability of a GRF estimation algorithm using inertial measurement units during outdoor running. Twelve well-trained participants completed 3 running sessions on different days, on an athletics track, instrumented with inertial measurement units on the lower legs and pelvis. Vertical accelerations were used to estimate the GRF. The goal was to assess the algorithm's repeatability across 3 sessions in a real-world setting, aiming to bridge the gap between laboratory and outdoor measurements. Results showed a good level of repeatability, with an intraclass correlation coefficient (2, k) of .86 for peak GRF, root mean square error of .08 times body weight (3.5%) and Pearson correlation coefficients exceeding .99 between the days. This is the first study looking into the day-to-day repeatability of the estimation of GRF, showing the potential to use this algorithm daily.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-12"},"PeriodicalIF":1.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143469931","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

A Randomized Crossover Trial on the Effects of Cadence on Calf Raise Test Outcomes: Cadence Does Matter.

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-02-18 DOI: 10.1123/jab.2024-0104

Kim Hébert-Losier, Ma Roxanne Fernandez, Josie Athens, Masayoshi Kubo, Seth O'Neill

{"title":"A Randomized Crossover Trial on the Effects of Cadence on Calf Raise Test Outcomes: Cadence Does Matter.","authors":"Kim Hébert-Losier, Ma Roxanne Fernandez, Josie Athens, Masayoshi Kubo, Seth O'Neill","doi":"10.1123/jab.2024-0104","DOIUrl":"https://doi.org/10.1123/jab.2024-0104","url":null,"abstract":"The calf raise test (CRT) is commonly used to assess triceps surae muscle-tendon unit function. Often, a metronome set to 60 beats/min (30 repetitions/min) is used to set the cadence of calf raise repetitions, but studies report using cadences ranging from 30 to 120 beats/min. We investigated the effect of cadence on CRT outcomes, accounting for the potential confounders of sex, age, body mass index, and physical activity. Thirty-six healthy individuals (50% female) performed single-leg calf raise repetitions to volitional exhaustion in 3 randomized cadence conditions, 7 days apart: 30, 60, and 120 beats/min. Repetitions, total vertical displacement, total work, peak height, and peak power were recorded using the validated Calf Raise application. Cadence significantly affected all CRT outcomes (P ≤ .008), except repetitions (P = .200). Post hoc analysis revealed 60 beats/min resulted in significantly greater total vertical displacement and work than 30 and 120 beats/min. Peak height was greater at 60 and 120 than 30 beats/min, and peak power was greater at 120 beats/min. Males generated greater work and peak power (P ≤ .001), whereas individuals with greater body mass index completed less repetitions (P = .008), achieved lower total vertical displacements (P = .003), and generated greater peak power (P = .005). CRT cadence is important to consider when interpreting CRT outcomes and comparing data between studies.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-10"},"PeriodicalIF":1.1,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143459922","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

How Does Push-Off Distance Influence Force-Velocity Profile and Performance During Vertical Jumping?

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-02-14 DOI: 10.1123/jab.2024-0194

Félicie Pommerell, Sébastien Boyas, Pierre Samozino, Baptiste Morel, Jérémie Begue, Abderrahmane Rahmani, Nicolas Peyrot

{"title":"How Does Push-Off Distance Influence Force-Velocity Profile and Performance During Vertical Jumping?","authors":"Félicie Pommerell, Sébastien Boyas, Pierre Samozino, Baptiste Morel, Jérémie Begue, Abderrahmane Rahmani, Nicolas Peyrot","doi":"10.1123/jab.2024-0194","DOIUrl":"https://doi.org/10.1123/jab.2024-0194","url":null,"abstract":"In many sports, practitioners must reach their maximal jump height (hmax) under time constraints. This requires a reduction of the countermovement depth and so of the push-off distance (hPO). The purpose of this study was to investigate how hPO influences force-velocity (F-v) profiles (F¯0, v¯0, P¯max, and SFv) and performance. Eleven participants (age: 26 [5] y, height: 175.6 [11.2] cm, mass: 76 [15] kg; squat 1RM: 129 [34] kg) performed maximal countermovement jumps. Kinetic and kinematic measurements were used to assess individual F-v profiles for 3 different hPO conditions (hPO-SMALL, hPO-MEDIUM, hPO-LARGE) from countermovement jumps performed under different load conditions (bodyweight [BW], BW + 8 kg, BW + 17 kg, BW + 40%1RM, BW + 70%1RM). Results indicated that F¯0 and P¯max changed across hPO conditions, while v¯0 remained constant. A lower hPO led to a significantly higher F¯0 and P¯max. These changes resulted in a steeper SFv leading to a more force-oriented profile, a lower optimal SFv and a greater F-v imbalance. Reducing hPO and modifying F-v profile led, to some extent, to a reduction in hmax. Performance is a compromise between hPO, P¯max, and F-v imbalance, all influenced by countermovement depth. This explains why reducing countermovement depth to meet time constraint may lower performance.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-6"},"PeriodicalIF":1.1,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143426822","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

Forty Years of the Journal of Applied Biomechanics: A Message From the Editor.

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-01-30 DOI: 10.1123/jab.2025-0018

Katherine A Boyer

引用次数: 0

Electromyography-Informed Estimates of Joint Contact Forces Within the Lower Back and Knee Joints During a Diverse Set of Industry-Relevant Manual Lifting Tasks. 在不同的工业相关手动举重任务中，肌电图对下背部和膝关节关节接触力的知情估计。

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-01-13 DOI: 10.1123/jab.2023-0292

Felicia R Davenport, Jennifer K Leestma, Adriana Staten, Krishan Bhakta, Joshua Fernandez, Anirban Mazumdar, Aaron J Young, Gregory S Sawicki

{"title":"Electromyography-Informed Estimates of Joint Contact Forces Within the Lower Back and Knee Joints During a Diverse Set of Industry-Relevant Manual Lifting Tasks.","authors":"Felicia R Davenport, Jennifer K Leestma, Adriana Staten, Krishan Bhakta, Joshua Fernandez, Anirban Mazumdar, Aaron J Young, Gregory S Sawicki","doi":"10.1123/jab.2023-0292","DOIUrl":"https://doi.org/10.1123/jab.2023-0292","url":null,"abstract":"Repetitive manual labor tasks involving twisting, bending, and lifting commonly lead to lower back and knee injuries in the workplace. To identify tasks with high injury risk, we recruited N = 9 participants to perform industry-relevant, 2-handed lifts with a 11-kg weight. These included symmetrical/asymmetrical, ascending/descending lifts that varied in start-to-end heights (knee-to-waist and waist-to-shoulder). We used a data-driven musculoskeletal model that combined force and motion data with a muscle activation-informed solver (OpenSim, CEINMS) to estimate 3-dimensional internal joint contact forces (JCFs) in the lower back (L5/S1) and knee. Symmetrical lifting resulted in larger peak JCFs than asymmetrical lifting in both the L5/S1 (+20.2% normal [P < .01], +20.3% shear [P = .001], +20.6% total [P < .01]) and the knee (+39.2% shear [P = .001]), and there were no differences in peak JCFs between ascending versus descending motions. Below-the-waist lifting generated significantly greater JCFs in the L5/S1 and knee than above-the-waist lifts (P < .01). We found a positive correlation between knee and L5/S1 peak total JCFs (R2 = .60, P < .01) across the task space, suggesting motor coordination that favors sharing of load distribution across the trunk and legs during lifting.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-10"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142980747","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

Outdoor Overground Gait Biomechanics and Energetics in Individuals With Transtibial Amputation Walking With a Prescribed Passive Prosthesis and a Bionic Myoelectric Prosthesis. 使用指定被动假体和仿生肌电假体行走的经胫截肢患者的户外地面步态生物力学和能量学。

IF 1.1 4区医学

Journal of Applied Biomechanics Pub Date : 2025-01-13 DOI: 10.1123/jab.2024-0081

Nicole Stafford, Eddie B Gonzalez, Daniel Ferris

{"title":"Outdoor Overground Gait Biomechanics and Energetics in Individuals With Transtibial Amputation Walking With a Prescribed Passive Prosthesis and a Bionic Myoelectric Prosthesis.","authors":"Nicole Stafford, Eddie B Gonzalez, Daniel Ferris","doi":"10.1123/jab.2024-0081","DOIUrl":"https://doi.org/10.1123/jab.2024-0081","url":null,"abstract":"The metabolic cost of walking for individuals with transtibial amputation is generally greater compared with able-bodied individuals. One aim of powered prostheses is to reduce metabolic deficits by replicating biological ankle function. Individuals with transtibial amputation can activate their residual limb muscles to volitionally control bionic ankle prostheses for walking; however, it is unknown how myoelectric control performs outside the laboratory. We recruited 6 individuals with transtibial amputation to walk an outdoor course with the Open Source Leg prosthesis under continuous proportional myoelectric control and compared it with their passive device. There were no significant differences (P = .142) in cost of transport between prostheses. Participants significantly increased residual limb vastus lateralis (P = .042) and rectus femoris (P = .029) muscle activity during early and midstance phase of walking with the powered prosthesis compared with their passive device. All but one participant preferred walking with myoelectric control compared with their passive prosthesis. The additional mass of the powered ankle prosthesis coupled with increased residual quadriceps activity could explain why the energy cost of walking was not lower compared with a passive prosthesis. This study demonstrates participants can volitionally control a bionic ankle prosthesis to navigate real-world environments.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-10"},"PeriodicalIF":1.1,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142980752","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