Journal of Applied Biomechanics最新文献_第10页

The Effects of an Acute Maximal Seated Lumbar Spine Flexion Exposure on Low Back Mechanical Pain Sensitivity. 急性最大坐姿腰椎屈曲暴露对腰背部机械疼痛敏感性的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2022-02-01 Epub Date: 2022-12-30 DOI: 10.1123/jab.2021-0238

Daniel Viggiani, Jack P Callaghan

{"title":"The Effects of an Acute Maximal Seated Lumbar Spine Flexion Exposure on Low Back Mechanical Pain Sensitivity.","authors":"Daniel Viggiani, Jack P Callaghan","doi":"10.1123/jab.2021-0238","DOIUrl":"https://doi.org/10.1123/jab.2021-0238","url":null,"abstract":"Viscoelastic creep generated in the lumbar spine following sustained spine flexion may affect the relationship between tissue damage and perceived pain. Two processes supporting this altered relationship include altered neural feedback and inflammatory processes. Our purpose was to determine how low back mechanical pain sensitivity changes following seated lumbar spine flexion using pressure algometry in a repeated-measures, cross-sectional laboratory design. Thirty-eight participants underwent a 10-minute sustained seated maximal flexion exposure with a 40-minute standing recovery period. Pressure algometry assessed pressure pain thresholds and the perceived intensity and unpleasantness of fixed pressures. Accelerometers measured spine flexion angles, and electromyography measured muscular activity during flexion. The flexion exposure produced 4.4° (2.7°) of creep that persisted throughout the entire recovery period. The perception of low back stimulus unpleasantness was elevated immediately following the exposure, 20 minutes before a delayed increase in lumbar erector spinae muscle activity. Women reported the fixed pressures to be more intense than men. Sustained flexion had immediate consequences to the quality of mechanical stimulus perceived but did not alter pressure pain thresholds. Neural feedback and inflammation seemed unlikely mechanisms for this given the time and direction of pain sensitivity changes, leaving a postulated cortical influence.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"12-19"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39773248","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

Career Head Impact Exposure Profile of Canadian University Football Players. 加拿大大学足球运动员职业生涯头部撞击暴露分析。

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.2020-0228

Jeffrey S Brooks, Kody R Campbell, Wayne Allison, Andrew M Johnson, James P Dickey

{"title":"Career Head Impact Exposure Profile of Canadian University Football Players.","authors":"Jeffrey S Brooks, Kody R Campbell, Wayne Allison, Andrew M Johnson, James P Dickey","doi":"10.1123/jab.2020-0228","DOIUrl":"https://doi.org/10.1123/jab.2020-0228","url":null,"abstract":"This study quantified head impact exposures for Canadian university football players over their varsity career. Participants included 63 players from one team that participated in a minimum of 3 seasons between 2013 and 2018. A total of 127,192 head impacts were recorded from 258 practices and 65 games. The mean (SD) number of career impacts across all positions was 2023.1 (1296.4), with an average of 37.1 (20.3) impacts per game and 7.4 (4.4) impacts per practice. The number of head impacts that players experienced during their careers increased proportionally to the number of athletic exposures (P < .001, r = .57). Linebackers and defensive and offensive linemen experienced significantly more head impacts than defensive backs, quarterbacks, and wide receivers (P ≤ .014). Seniority did not significantly affect the number of head impacts a player experienced. Mean linear acceleration increased with years of seniority within defensive backs and offensive linemen (P ≤ .01). Rotational velocity increased with years of seniority within defensive backs, defensive and offensive linemen, running backs, and wide receivers (P < .05). These data characterize career metrics of head impact exposure for Canadian university football players and provide insights to reduce head impacts through rule modifications and contact regulations.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"38 1","pages":"47-57"},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39922454","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

Dr. Richard C. Nelson: Behind the Scenes. 理查德·纳尔逊博士:幕后。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-12-01 DOI: 10.1123/jab.2021-0295

Doris I Miller

引用次数: 1

An Electromyographically Driven Cervical Spine Model in OpenSim. OpenSim中肌电图驱动的颈椎模型。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-09-20 DOI: 10.1123/jab.2020-0384

Jeff M Barrett, Colin D McKinnon, Clark R Dickerson, Jack P Callaghan

{"title":"An Electromyographically Driven Cervical Spine Model in OpenSim.","authors":"Jeff M Barrett, Colin D McKinnon, Clark R Dickerson, Jack P Callaghan","doi":"10.1123/jab.2020-0384","DOIUrl":"https://doi.org/10.1123/jab.2020-0384","url":null,"abstract":"Relatively few biomechanical models exist aimed at quantifying the mechanical risk factors associated with neck pain. In addition, there is a need to validate spinal-rhythm techniques for inverse dynamics spine models. Therefore, the present investigation was 3-fold: (1) the development of a cervical spine model in OpenSim, (2) a test of a novel spinal-rhythm technique based on minimizing the potential energy in the passive tissues, and (3) comparison of an electromyographically driven approach to estimating compression and shear to other cervical spine models. The authors developed ligament force-deflection and intervertebral joint moment-angle curves from published data. The 218 Hill-type muscle elements, representing 58 muscles, were included and their passive forces validated against in vivo data. Our novel spinal-rhythm technique, based on minimizing the potential energy in the passive tissues, disproportionately assigned motion to the upper cervical spine that was not physiological. Finally, using kinematics and electromyography collected from 8 healthy male volunteers, the authors calculated the compression at C7-T1 as a function of the head-trunk Euler angles. Differences from other models varied from 25.5 to 368.1 N. These differences in forces may result in differences in model geometry, passive components, number of degrees of freedom, or objective functions.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"37 5","pages":"481-493"},"PeriodicalIF":1.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39455419","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: 6

Hip Abductor Rate of Torque Development as Opposed to Isometric Strength Predicts Peak Knee Valgus During Landing: Implications for Anterior Cruciate Ligament Injury. 髋外展肌扭矩发展速率与等长强度相反，可预测着陆时膝关节外翻峰值:对前交叉韧带损伤的影响。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-09-20 DOI: 10.1123/jab.2020-0398

Kristen M Stearns-Reider, Rachel K Straub, Christopher M Powers

{"title":"Hip Abductor Rate of Torque Development as Opposed to Isometric Strength Predicts Peak Knee Valgus During Landing: Implications for Anterior Cruciate Ligament Injury.","authors":"Kristen M Stearns-Reider, Rachel K Straub, Christopher M Powers","doi":"10.1123/jab.2020-0398","DOIUrl":"https://doi.org/10.1123/jab.2020-0398","url":null,"abstract":"Peak knee valgus has been shown to predict anterior cruciate ligament injury. The purpose of the current study was to compare peak rate of torque development (RTD) to peak isometric torque as a predictor of peak knee valgus during landing. Twenty-three healthy females participated. Hip abductor muscle performance was quantified using 2 types of isometric contractions: sustained and rapid. Peak isometric torque was calculated from the sustained isometric contraction. Peak RTD was calculated from the rapid isometric contraction (0-50 and 0-200 ms after force initiation). Kinematic data were collected during the deceleration phase of a double-leg drop jump task. Linear regression was used to assess the ability of hip abductor muscle performance variables to predict peak knee valgus. Increased peak RTD during the 0 to 50 milliseconds window after force initiation was found to significantly predict lower peak knee valgus (P = .011, R2 = .32). In contrast, neither peak RTD from 0 to 200 milliseconds after force initiation window (P = .45, R2 = .03) nor peak isometric torque (P = .49, R2 = .03) predicted peak knee valgus. The inability of the hip abductors to rapidly generate muscular force may be more indicative of \"at-risk\" movement behavior in females than measures of maximum strength.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"37 5","pages":"471-476"},"PeriodicalIF":1.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39455420","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

Estimating Center of Mass Kinematics During Perturbed Human Standing Using Accelerometers. 用加速度计估计人体摄动站立时的质心运动学。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-08-27 DOI: 10.1123/jab.2020-0222

Sandra K Hnat, Musa L Audu, Ronald J Triolo, Roger D Quinn

{"title":"Estimating Center of Mass Kinematics During Perturbed Human Standing Using Accelerometers.","authors":"Sandra K Hnat, Musa L Audu, Ronald J Triolo, Roger D Quinn","doi":"10.1123/jab.2020-0222","DOIUrl":"https://doi.org/10.1123/jab.2020-0222","url":null,"abstract":"Estimating center of mass (COM) through sensor measurements is done to maintain walking and standing stability with exoskeletons. The authors present a method for estimating COM kinematics through an artificial neural network, which was trained by minimizing the mean squared error between COM displacements measured by a gold-standard motion capture system and recorded acceleration signals from body-mounted accelerometers. A total of 5 able-bodied participants were destabilized during standing through: (1) unexpected perturbations caused by 4 linear actuators pulling on the waist and (2) volitionally moving weighted jars on a shelf. Each movement type was averaged across all participants. The algorithm's performance was quantified by the root mean square error and coefficient of determination (R2) calculated from both the entire trial and during each perturbation type. Throughout the trials and movement types, the average coefficient of determination was 0.83, with 89% of the movements with R2 > .70, while the average root mean square error ranged between 7.3% and 22.0%, corresponding to 0.5- and 0.94-cm error in both the coronal and sagittal planes. COM can be estimated in real time for balance control of exoskeletons for individuals with a spinal cord injury, and the procedure can be generalized for other gait studies.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"37 5","pages":"415-424"},"PeriodicalIF":1.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39360532","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

Clinical Walking Tests and Gait Pattern Characterization During 6-Minute Walk Test Using Inertial Sensors: Follow-Up in Individuals With Lower Limb Amputation. 使用惯性传感器进行6分钟步行试验期间的临床步行试验和步态模式表征:下肢截肢患者的随访。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-09-09 DOI: 10.1123/jab.2020-0327

Hananeh Younesian, Thomas Legrand, Ludovic Miramand, Sarah Beausoleil, Katia Turcot

{"title":"Clinical Walking Tests and Gait Pattern Characterization During 6-Minute Walk Test Using Inertial Sensors: Follow-Up in Individuals With Lower Limb Amputation.","authors":"Hananeh Younesian, Thomas Legrand, Ludovic Miramand, Sarah Beausoleil, Katia Turcot","doi":"10.1123/jab.2020-0327","DOIUrl":"https://doi.org/10.1123/jab.2020-0327","url":null,"abstract":"Inertial measurement units and normative values enable clinicians to quantify clinical walking tests and set rehabilitation goals. Objectives of this study were (1) to compare time- and distance-based walking tests in individuals with lower limb amputation (iLLA) and normative values following rehabilitation discharge (T1) and 6 weeks after discharge (T2) and (2) to investigate spatiotemporal and foot kinematic parameters over a 6-minute walk test using inertial measurement units. Twelve iLLA participated in this study. Distance, cadence, stance ratio, loading rate ratio, push-up ratio, path length, and minimum toe clearance were analyzed during 6-minute walk test. Nonparametric repeated-measures analysis of variance tests, Bonferroni corrections, were performed. Time of distance-based walking tests diminished at T2 (P < .02). Compared with normative values, walking performance in iLLA was reduced. Cadence at T2 increased significantly (P = .026). Stance ratio increased in both legs at T2 (P < .05). Push-up ratio tended to decrease at T2 in the amputated leg (P = .0003). Variability of path length and minimum toe clearance at T2 were less than at T1 in the nonamputated leg (P < .05). Spatiotemporal improvement at T2 could be due to prosthesis adaptation in iLLA. The lower performance of the functional walk test compared with normative values could be due to amputation and pain-related fatigue.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"37 5","pages":"440-449"},"PeriodicalIF":1.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39402528","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

Clinical Estimation of the Use of the Hip and Knee Extensors During Athletic Movements Using 2D Video. 使用2D视频对运动过程中髋关节和膝关节伸肌使用的临床评估。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-09-02 DOI: 10.1123/jab.2021-0055

Rachel K Straub, Alex Horgan, Christopher M Powers

{"title":"Clinical Estimation of the Use of the Hip and Knee Extensors During Athletic Movements Using 2D Video.","authors":"Rachel K Straub, Alex Horgan, Christopher M Powers","doi":"10.1123/jab.2021-0055","DOIUrl":"https://doi.org/10.1123/jab.2021-0055","url":null,"abstract":"Given that increased use of the knee extensors relative to the hip extensors may contribute to various knee injuries, there is a need for a practical method to characterize movement behavior indicative of how individuals utilize the hip and knee extensors during dynamic tasks. The purpose of the current study was to determine whether the difference between sagittal plane trunk and tibia orientations obtained from 2D video (2D trunk-tibia) could be used to predict the average hip/knee extensor moment ratio during athletic movements. Thirty-nine healthy athletes (15 males and 24 females) performed 6 tasks (step down, drop jump, lateral shuffle, deceleration, triple hop, and side-step-cut). Lower-extremity kinetics (3D) and sagittal plane video (2D) were collected simultaneously. Linear regression analysis was performed to determine if the 2D trunk-tibia angle at peak knee flexion predicted the average hip/knee extensor moment ratio during the deceleration phase of each task. For each task, an increase in the 2D trunk-tibia angle predicted an increase in the average hip/knee extensor moment ratio when adjusted for body mass (all P < .013, R2 = .17-.77). The 2D trunk-tibia angle represents a practical method to characterize movement behavior that is indicative of how individuals utilize the hip and knee extensors during dynamic tasks.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"37 5","pages":"458-462"},"PeriodicalIF":1.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39377876","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

Drop Landing Biomechanics in Individuals With and Without a Concussion History. 有和没有脑震荡史的个体的落体生物力学。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-09-09 DOI: 10.1123/jab.2021-0097

Eric J Shumski, Tricia M Kasamatsu, Kathleen S Wilson, Derek N Pamukoff

{"title":"Drop Landing Biomechanics in Individuals With and Without a Concussion History.","authors":"Eric J Shumski, Tricia M Kasamatsu, Kathleen S Wilson, Derek N Pamukoff","doi":"10.1123/jab.2021-0097","DOIUrl":"https://doi.org/10.1123/jab.2021-0097","url":null,"abstract":"Research has identified an increased risk of lower extremity injury postconcussion, which may be due to aberrant biomechanics during dynamic tasks. The purpose of this study was to compare the drop landing biomechanics between individuals with and without a concussion history. Twenty-five individuals with and 25 without a concussion history were matched on age (±3 y), sex, and body mass index (±1 kg/m2). Three-dimensional landing biomechanics were recorded to obtain dependent variables (peak vertical ground reaction force, loading rate, knee flexion angle and external moment, knee abduction angle and external moment, and knee flexion and abduction angle at ground contact). A 1-way multivariate analysis of variance compared outcomes between groups. There was no difference in drop landing biomechanics between individuals with and without a concussion history (F10,39 = 0.460, P = .877, Wilk Λ = .918). There was an effect of time since concussion on knee flexion characteristics. Time since most recent concussion explained a significant amount of variation in both peak (ΔR2 = .177, β = -0.305, ΔP = .046) and initial ground contact (ΔR2 = .292, β = -0.204, ΔP = .008) knee flexion angle after covarying for sex and body mass index. Therefore, time since concussion should be considered when evaluating biomechanical patterns.","PeriodicalId":54883,"journal":{"name":"Journal of Applied Biomechanics","volume":"37 5","pages":"450-457"},"PeriodicalIF":1.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39402526","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

Lessons Learned: Consider the Context. 经验教训:考虑情境。

IF 1.4 4区医学

Journal of Applied Biomechanics Pub Date : 2021-10-01 Epub Date: 2021-09-09 DOI: 10.1123/jab.2021-0228

Jill L McNitt-Gray

引用次数: 0