Journal of Applied Biomechanics最新文献_第9页

Lead Foot Progression Angle in Baseball Pitchers: Implications to Ball Velocity and Upper-Extremity Joint Moments. 棒球投手的前脚前进角度:对球速度和上肢关节力矩的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-03-29 DOI: 10.1123/jab.2021-0324

M. Solomito, A. Cohen, Erin Garibay, C. Nissen

{"title":"Lead Foot Progression Angle in Baseball Pitchers: Implications to Ball Velocity and Upper-Extremity Joint Moments.","authors":"M. Solomito, A. Cohen, Erin Garibay, C. Nissen","doi":"10.1123/jab.2021-0324","DOIUrl":"https://doi.org/10.1123/jab.2021-0324","url":null,"abstract":"The instant of foot contact is an important transition point during the pitch cycle between the linear portion of the pitch, as a pitcher strides down the mound and the rotational portion of the pitch. Understanding the implications of lead foot angle at foot contact is an essential information needed to assist pitching coaches in their work with individual pitchers. Therefore, the purpose of this study was to determine the association between lead foot progression angle at foot contact and ball velocity, elbow varus moment, and pelvic rotation. Kinematic and kinetic data were collected from 99 collegiate pitchers and analyzed using a random intercept, mixed-effects regression model. Significant associations were found between lead foot progression angle at foot contact and elbow varus moment (P = .004), as well as pelvic rotation throughout the pitching motion (P < .001). The data indicate that increased lead foot internal rotation at foot contact is associated with increases in the elbow varus moment but is not associated with ball velocity. This study provides scientific evidence that the rotational positioning of the lead foot can affect both pelvic motion and upper-extremity joint moments.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"1 1","pages":"1-7"},"PeriodicalIF":1.4,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44738402","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

Optimized Simulation of Upper Body Timing on the Production of Bat-Head Speed in Baseball Batting. 棒球击球中上肢时间对球头速度产生的优化模拟。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-03-11 DOI: 10.1123/jab.2021-0135

Kazumichi Ae, D. Burke, T. Kawamura, S. Koike

{"title":"Optimized Simulation of Upper Body Timing on the Production of Bat-Head Speed in Baseball Batting.","authors":"Kazumichi Ae, D. Burke, T. Kawamura, S. Koike","doi":"10.1123/jab.2021-0135","DOIUrl":"https://doi.org/10.1123/jab.2021-0135","url":null,"abstract":"The objectives of this study were to (1) investigate the effect of the timing of the upper body joint motions in baseball batting on the bat-head speed and (2) develop and evaluate a simulation model inputting the individual hand forces on the bat. Twenty-three male collegiate baseball players performed tee batting set at waist height. A 10-segment angle-driven simulation model consisting of a bat and upper body was driven using the coordinate data of the standard motion. Performance optimization was conducted by changing the timing of the joint angle time histories of the upper body to increase the maximum bat-head speed. The optimization simultaneously estimated the individual hand forces by polynomial approximation dependent on the total bat forces to assess joint torques of the upper body. The bat-head speed increased to 39.2 m/s from 35.6 m/s, and the optimized timings were characterized by the earlier timing of the barrel-side elbow supination, wrist radial flexion, torso right lateral flexion, and the later timing of the barrel-side shoulder abduction. It is concluded that the skillful coordination of the individual joint movements for the upper body can produce a higher bat-head speed through effective sequencing of proximal to distal movements.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"1 1","pages":"1-8"},"PeriodicalIF":1.4,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46047563","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

Agreement Between Sagittal Foot and Tibia Angles During Running Derived From an Open-Source Markerless Motion Capture Platform and Manual Digitization. 跑步时矢状足和胫骨角度的一致性来源于一个开源的无标记运动捕捉平台和手动数字化。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-03-10 DOI: 10.1123/jab.2021-0323

C. Johnson, J. Outerleys, I. Davis

{"title":"Agreement Between Sagittal Foot and Tibia Angles During Running Derived From an Open-Source Markerless Motion Capture Platform and Manual Digitization.","authors":"C. Johnson, J. Outerleys, I. Davis","doi":"10.1123/jab.2021-0323","DOIUrl":"https://doi.org/10.1123/jab.2021-0323","url":null,"abstract":"Several open-source platforms for markerless motion capture offer the ability to track 2-dimensional (2D) kinematics using simple digital video cameras. We sought to establish the performance of one of these platforms, DeepLabCut. Eighty-four runners who had sagittal plane videos recorded of their left lower leg were included in the study. Data from 50 participants were used to train a deep neural network for 2D pose estimation of the foot and tibia segments. The trained model was used to process novel videos from 34 participants for continuous 2D coordinate data. Overall network accuracy was assessed using the train/test errors. Foot and tibia angles were calculated for 7 strides using manual digitization and markerless methods. Agreement was assessed with mean absolute differences and intraclass correlation coefficients. Bland-Altman plots and paired t tests were used to assess systematic bias. The train/test errors for the trained network were 2.87/7.79 pixels, respectively (0.5/1.2 cm). Compared to manual digitization, the markerless method was found to systematically overestimate foot angles and underestimate tibial angles (P < .01, d = 0.06-0.26). However, excellent agreement was found between the segment calculation methods, with mean differences ≤1° and intraclass correlation coefficients ≥.90. Overall, these results demonstrate that open-source, markerless methods are a promising new tool for analyzing human motion.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"1 1","pages":"1-6"},"PeriodicalIF":1.4,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44344093","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: 3

The Effects of Wobbling Mass Components on Joint Dynamics During Running. 运动过程中摇摆质量部件对关节动力学的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-03-01 DOI: 10.1123/jab.2021-0051

Samuel E Masters, J. Challis

{"title":"The Effects of Wobbling Mass Components on Joint Dynamics During Running.","authors":"Samuel E Masters, J. Challis","doi":"10.1123/jab.2021-0051","DOIUrl":"https://doi.org/10.1123/jab.2021-0051","url":null,"abstract":"Soft tissue moves relative to the underlying bone during locomotion. Research has shown that soft tissue motion has an effect on aspects of the dynamics of running; however, little is known about the effects of soft tissue motion on the joint kinetics. In the present study, for a single subject, soft tissue motion was modeled using wobbling components in an inverse dynamics analysis to access the effects of the soft tissue on joint kinetics at the knee and hip. The added wobbling components had little effect on the knee joint kinetics, but large effects on the hip joint kinetics. In particular, the hip joint power and net negative and net positive mechanical work at the hip was greatly underestimated when calculated with the model without wobbling components compared with that of the model with wobbling components. For example, for low-frequency wobbling conditions, the magnitude of the peak hip joint moments were 50% greater when computed accounting the wobbling masses compared with a rigid body model, while for high-frequency wobbling conditions, the peaks were within 15%. The present study suggests that soft tissue motion should not be ignored during inverse dynamics analyses of running.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":" ","pages":"1-7"},"PeriodicalIF":1.4,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48428373","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: 2

Characterization of Head Impact Exposure in Women's Collegiate Soccer. 女子大学足球运动员头部撞击暴露特征分析。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2021-12-15 DOI: 10.1123/jab.2020-0304

Tanner M Filben, Nicholas S Pritchard, Logan E Miller, Sarah K Woods, Megan E Hayden, Christopher M Miles, Jillian E Urban, Joel D Stitzel

{"title":"Characterization of Head Impact Exposure in Women's Collegiate Soccer.","authors":"Tanner M Filben, Nicholas S Pritchard, Logan E Miller, Sarah K Woods, Megan E Hayden, Christopher M Miles, Jillian E Urban, Joel D Stitzel","doi":"10.1123/jab.2020-0304","DOIUrl":"https://doi.org/10.1123/jab.2020-0304","url":null,"abstract":"Soccer players are regularly exposed to head impacts by intentionally heading the ball. Evidence suggests repetitive subconcussive head impacts may affect the brain, and females may be more vulnerable to brain injury than males. This study aimed to characterize head impact exposure among National Collegiate Athletic Association women's soccer players using a previously validated mouthpiece-based sensor. Sixteen players were instrumented during 72 practices and 24 games. Head impact rate and rate of risk-weighted cumulative exposure were compared across session type and player position. Head kinematics were compared across session type, impact type, player position, impact location, and ball delivery method. Players experienced a mean (95% confidence interval) head impact rate of 0.468 (0.289 to 0.647) head impacts per hour, and exposure rates varied by session type and player position. Headers accounted for 89% of head impacts and were associated with higher linear accelerations and rotational accelerations than nonheader impacts. Headers in which the ball was delivered by a long kick had greater peak kinematics (all P < .001) than headers in which the ball was delivered by any other method. Results provide increased understanding of head impact frequency and magnitude in women's collegiate soccer and may help inform efforts to prevent brain injury.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"2-11"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39840568","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: 8

Influence of Articular Geometry and Tibial Tubercle Location on Patellofemoral Kinematics and Contact Mechanics. 关节几何形状和胫骨结节位置对髌骨运动学和接触力学的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2022-01-19 DOI: 10.1123/jab.2021-0162

Allison L Clouthier, Daniel Borschneck, Colin R Smith, Michael F Vignos, Darryl G Thelen, Kevin J Deluzio, Michael J Rainbow

{"title":"Influence of Articular Geometry and Tibial Tubercle Location on Patellofemoral Kinematics and Contact Mechanics.","authors":"Allison L Clouthier, Daniel Borschneck, Colin R Smith, Michael F Vignos, Darryl G Thelen, Kevin J Deluzio, Michael J Rainbow","doi":"10.1123/jab.2021-0162","DOIUrl":"https://doi.org/10.1123/jab.2021-0162","url":null,"abstract":"Trochlear groove geometry and the location of the tibial tubercle, where the patellar tendon inserts, have both been associated with patellofemoral instability and can be modified surgically. Although their effects on patellofemoral biomechanics have been investigated individually, the interaction between the two is unclear. The authors' aim was to use statistical shape modeling and musculoskeletal simulation to examine the effect of patellofemoral geometry on the relationship between tibial tubercle location and patellofemoral function. A statistical shape model was used to generate new knee geometries with trochlear grooves ranging from shallow to deep. A Monte Carlo approach was used to create 750 knee models by randomly selecting a geometry and randomly translating the tibial tubercle medially/laterally and anteriorly. Each knee model was incorporated into a musculoskeletal model, and an overground walking trial was simulated. Knees with shallow trochlear geometry were more sensitive to tubercle medialization with greater changes in lateral patella position (-3.0 mm/cm medialization shallow vs -0.6 mm/cm deep) and cartilage contact pressure (-0.51 MPa/cm medialization shallow vs 0.04 MPa/cm deep). However, knees with deep trochlear geometry experienced greater increases in medial cartilage contact pressure with medialization. This modeling framework has the potential to aid in surgical decision making.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"58-66"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39832270","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: 4

Characteristics of Forces at the Clinician-Patient and Patient-Table Interfaces During Thoracic Spinal Manipulation in Asymptomatic Adults Are Consistent With Deformable Body Models. 无症状成人胸椎操作过程中临床-患者和患者-手术台界面的力特征与可变形体模型一致。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2022-01-21 DOI: 10.1123/jab.2021-0255

Joshua Thomas, Thomas Murphy, Steve Tran, Samuel J Howarth, David Starmer, Martha Funabashi

{"title":"Characteristics of Forces at the Clinician-Patient and Patient-Table Interfaces During Thoracic Spinal Manipulation in Asymptomatic Adults Are Consistent With Deformable Body Models.","authors":"Joshua Thomas, Thomas Murphy, Steve Tran, Samuel J Howarth, David Starmer, Martha Funabashi","doi":"10.1123/jab.2021-0255","DOIUrl":"https://doi.org/10.1123/jab.2021-0255","url":null,"abstract":"Investigating all forces exerted on the patient's body during high-velocity, low-amplitude spinal manipulative therapy (SMT) remains fundamental to elucidate how these may contribute to SMT's effects. Previous conflicting findings preclude our understanding of the relationship between SMT forces acting at the clinician-patient and patient-table interfaces. This study aimed to quantify forces at the clinician-participant and participant-table interfaces during thoracic SMT in asymptnomatic adults. An experienced clinician provided a posterior to anterior SMT centered to T7 transverse processes using predetermined force-time characteristics to 40 asymptomatic volunteers (20 females; average age = 27.2 [4.9] y). Forces at the clinician-participant interface were recorded by triaxial load cells; whereas, forces at the participant-table interface were recorded by the force-sensing table technology. Preload force, total peak force, time to peak, and loading rate at each interface were analyzed descriptively. Total peak vertical forces at the clinician-participant interface averaged 532 (71) N while total peak forces at the participant-table interface averaged 658 (33) N. Forces at the participant-table interface were, on average, 1.27 (0.25) times larger than the ones at the clinician-participant interface. Larger forces at the participant-table interface compared with the ones at the clinician-participant interface during thoracic SMT are consistent with mathematical models developed to investigate thoracic impact simulating a dynamic force-deflection response.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"39-46"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39707980","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: 2

Hip-Knee Joint Coordination Patterns are Associated With Patellofemoral Joint Cartilage Composition in Patients With Anterior Cruciate Ligament Reconstruction. 前交叉韧带重建患者的髋关节-膝关节协调模式与髌股关节软骨组成相关

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2022-01-18 DOI: 10.1123/jab.2021-0111

Michael A Samaan, Valentina Pedoia, Matthew S Tanaka, Richard B Souza, C Benjamin Ma, Xiaojuan Li

{"title":"Hip-Knee Joint Coordination Patterns are Associated With Patellofemoral Joint Cartilage Composition in Patients With Anterior Cruciate Ligament Reconstruction.","authors":"Michael A Samaan, Valentina Pedoia, Matthew S Tanaka, Richard B Souza, C Benjamin Ma, Xiaojuan Li","doi":"10.1123/jab.2021-0111","DOIUrl":"https://doi.org/10.1123/jab.2021-0111","url":null,"abstract":"Joint coordination variability during walking that is associated with patellofemoral joint cartilage degeneration after anterior cruciate ligament reconstruction are not well understood. The purpose of this study was to assess between-limb differences in joint coordination variability and to determine the relationship of coordination variability with postoperative patellofemoral joint cartilage composition. Thirty-five patients underwent bilateral gait analysis and a magnetic resonance exam of the reconstructed knee joint at 6 months post anterior cruciate ligament reconstruction. Vector coding was used to assess coordination variability during the early (1%-33%), mid (34%-66%), and late (67%-100%) stance phase. The T1ρ/T2 mapping was used to evaluate the glycosaminoglycan-collagen matrix of the patellar and femoral trochlear cartilage. Compared with the uninjured limb, the reconstructed limb exhibited higher hip sagittal/knee sagittal plane coordination variability during midstance as well as higher knee sagittal/ankle sagittal plane coordination variability during both mid and late stance. The hip sagittal/knee sagittal plane coordination variability during midstance predicted 14.6% of the variance in patellar cartilage T1ρ values within the reconstructed limb. In addition, sex of participants was able to predict 32.4% and 13.7% of the variance in femoral trochlea T1ρ and T2 values, respectively. The study results demonstrate that a multijoint mechanism may be associated with early patellofemoral joint cartilage degeneration at 6 months after anterior cruciate ligament reconstruction.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"20-28"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8915429/pdf/nihms-1780525.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39830002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Comparison of 5 Normalization Methods for Knee Joint Moments in the Single-Leg Squat. 单腿深蹲中5种膝关节力矩归一化方法的比较

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2022-01-17 DOI: 10.1123/jab.2021-0143

Steven M Hirsch, Christopher J Chapman, David M Frost, Tyson A C Beach

{"title":"Comparison of 5 Normalization Methods for Knee Joint Moments in the Single-Leg Squat.","authors":"Steven M Hirsch, Christopher J Chapman, David M Frost, Tyson A C Beach","doi":"10.1123/jab.2021-0143","DOIUrl":"https://doi.org/10.1123/jab.2021-0143","url":null,"abstract":"Ratio scaling is the most common magnitude normalization approach for net joint moment (NJM) data. Generally, researchers compute a ratio between NJM and (some combination of) physical body characteristics (eg, mass, height, limb length, etc). However, 3 assumptions must be verified when normalizing NJM data this way. First, the regression line between NJM and the characteristic(s) used passes through the origin. Second, normalizing NJM eliminates its correlation with the characteristic(s). Third, the statistical interpretations following normalization are consistent with adjusted linear models. The study purpose was to assess these assumptions using data collected from 16 males and 16 females who performed a single-leg squat. Standard inverse dynamics analyses were conducted, and ratios were computed between the mediolateral and anteroposterior components of the knee NJM and participant mass, height, leg length, mass × height, and mass × leg length. Normalizing NJM-mediolateral by mass × height and mass × leg length satisfied all 3 assumptions. Normalizing NJM-anteroposterior by height and leg length satisfied all 3 assumptions. Therefore, if normalization of the knee NJM is deemed necessary to address a given research question, it can neither be assumed that using (any combination of) participant mass, height, or leg length as the denominator is appropriate nor consistent across joint axes.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"29-38"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39830007","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: 2

A Note From Katherine Boyer, the New Journal of Applied Biomechanics Editor-in-Chief. 《应用生物力学新杂志》主编凯瑟琳·博耶的注释。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2022-01-13 DOI: 10.1123/jab.2021-0394

Katherine A Boyer

引用次数: 0