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Journal of Applied Biomechanics

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https://www.readbyqxmd.com/read/29991299/2016-american-society-of-biomechanics-hay-award-lecture-preparing-for-impact-biomechanical-inspirations-from-olympic-sports
#1
Jill L McNitt-Gray
No abstract text is available yet for this article.
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989508/are-action-sport-cameras-accurate-enough-for-3d-motion-analysis-a-comparison-with-a-commercial-motion-capture-system
#2
Gustavo Ramos Dalla Bernardina, Tony Monnet, Heber Teixeira Pinto, Ricardo Machado Leite de Barros, Pietro Cerveri, Amanda Piaia Silvatti
The aim of this study was to assess the precision and accuracy of an Action Sport Camera (ASC) system (4 GoPro Hero3+ Black) by comparison with a commercial motion capture (MOCAP) system (4 ViconMX40). Both systems were calibrated using the MOCAP protocol and the 3D markers coordinates of a T-shaped tool were reconstructed, concurrently. The 3D precision was evaluated by the differences in the reconstructed position using a Bland-Altman test, while accuracy was assessed by a rigid bar test (Wilcoxon rank sum)...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989479/gait-mechanics-differences-between-healthy-controls-and-patients-with-peripheral-artery-disease-after-adjusting-for-gait-velocity-stride-length-and-step-width
#3
John D McCamley, Eric L Cutler, Kendra K Schmid, Shane R Wurdeman, Jason M Johanning, Iraklis I Pipinos, Sara A Myers
Patients with peripheral artery disease (PAD) experience significant leg dysfunction. The effects of PAD on gait include shortened steps, slower walking velocity, and altered gait kinematics and kinetics, which may confound joint torques and power measurements. Spatiotemporal parameters, joint torques and powers were calculated and compared between 20 patients with PAD and 20 healthy controls using independent t-tests. Separate ANCOVA models were used to evaluate group differences after independently adjusting for gait velocity, stride length and step width...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989477/the-functional-utilization-of-propulsive-capacity-during-human-walking
#4
Katie A Conway, Randall G Bissette, Jason R Franz
Aging and many gait pathologies are characterized by reduced propulsive forces and ankle moment and power generation during trailing leg push-off in walking. Despite those changes, we posit that many individuals retain an underutilized reserve for enhancing push-off intensity during walking that may be missed using conventional dynamometry. By using a maximum ramped impeding force protocol and maximum speed walking, we gained mechanistic insight into the factors that govern push-off intensity and the available capacity thereof during walking in young subjects...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989476/development-and-assessment-of-a-low-cost-clinical-gait-analysis-system
#5
Mary Emily Littrell, Young-Hui Chang, Brian P Selgrade
Clinically, measuring gait kinematics and ground reaction force (GRF) is useful to determine the effectiveness of treatment. However, it is inconvenient and expensive to maintain a laboratory-grade gait analysis system in most clinics. The purpose of this study was to validate a Wii Balance Board, Kinovea motion-tracking software, and a video camera as a portable, low-cost, overground gait analysis system. We validated this low-cost system against a multi-camera Vicon system and AMTI force platform. After validation trials with known weights and angles, five subjects walked across an instrumented walkway multiple times (n=8/subject)...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989471/standing-versus-stepping-exploring-the-relationships-between-postural-steadiness-and-dynamic-reactive-balance-control
#6
Michelle R Tanel, Tyler B Weaver, Andrew C Laing
While the literature has characterized balance control during quasi-static and/or dynamic tasks, comparatively few studies have examined relationships across paradigms. This study investigated whether quiet-stance postural steadiness metrics were associated with reactive control parameters (during both stepping and restabilisation phases) following a lean-and-release perturbation. Forty older adults participated. Postural steadiness (centre of pressure range, root mean square, velocity, and frequency) was evaluated in 'feet together' and 'tandem stance' positions...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989470/concurrent-validity-of-depth-sensing-cameras-for-non-contact-acl-injury-screening-during-side-cut-maneuvers-in-adolescent-athletes-a-preliminary-study
#7
Moataz Eltoukhy, Christopher Kuenze, Jeonghoon Oh, Eryn Apanovitch, Lauren Butler, Joseph F Signorile
Anterior cruciate ligament (ACL) injury is one of the most common knee injuries among adolescent athletes. Majority of the ACL injuries occur due to pivoting, sudden deceleration and direction change without contact with any player. Preventive interventions can reduce risks of the ACL injury, thus developing a clinician friendly biomechanical assessment tool to identify athletes with such risk factors is crucial. In this study, we investigated the concurrent validity of a commercially-available depth sensor, Microsoft Kinect, as a cost-effective alternative to the gold standard three-dimensional motion analysis systems in non-contact ACL screening for adolescent athletes during side-cut maneuvers...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989464/individual-step-characteristics-during-sprinting-in-unilateral-transtibial-amputees
#8
Hiroaki Hobara, Sakiko Saito, Satoru Hashizume, Hiroyuki Sakata, Yoshiyuki Kobayashi
To understand the step characteristics during sprinting in lower-extremity amputees using running-specific prosthesis, each athlete should be investigated individually. Theoretically, sprint performance in a 100-m sprint is determined by both step frequency and step length. The aim of the present study was to investigate how step frequency and step length correlate with sprinting performance in elite unilateral transtibial amputees. By using publicly available Internet broadcasts, we analyzed 88 races from seven unilateral transtibial amputees...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989457/stepping-to-an-auditory-metronome-improves-weight-bearing-symmetry-in-post-stroke-hemiparesis
#9
Rachel L Wright, Joseph W Bevins, David Pratt, Catherine M Sackley, Alan M Wing
Asymmetry in weight-bearing is a common feature in post-stroke hemiparesis, and is related to temporal asymmetry during walking. The aim of this study was to investigate the effect of an auditory cue for stepping in place on measures of temporal and weight-bearing asymmetry. Ten community-dwelling adults (four female) with chronic post-stroke hemiparesis performed 5 un-cued stepping trials and 5 stepping trials cued by an auditory metronome cue. A Vicon system was used to collect full body kinematic trajectories...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989456/biomechanical-outcomes-due-to-impact-loading-in-runners-while-looking-sideways
#10
Anamaria Laudet Silva Mangubat, Janet Hanwen Zhang, Zoe Yau-Shan Chan, Aislinn Joan MacPhail, Ivan Pui-Hung Au, Roy Tsz-Hei Cheung
A stable gaze is necessary to optimize visual conditions during running. Head accelerations generally remain stable when looking in front, however it is unclear if this response is similar when the head is turned sideways, and whether other adaptive strategies are present to maintain this stability. The purpose of this study, therefore, was to examine whether runners maintained stable head accelerations while gazing at fixed targets in front and to their sides. We collected biomechanical data from thirteen runners as they directed their gaze to visual targets located in front, 45-degree and 90-degree to the sides at a random sequence...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29989455/reliability-of-postural-sway-measures-of-standing-balance-tasks
#11
Saud F Alsubaie, Susan L Whitney, Joseph M Furman, Gregory F Marchetti, Kathleen H Sienko, Patrick J Sparto
The reliability of balance exercises performance in experimental and clinical studies has typically been confined to a small set of exercises. In order to advance the field of assessing balance exercise intensity, establishing the reliability of performance during a more diverse array of exercises should be undertaken. The purpose of this study was to investigate the test-retest reliability of postural sway produced during performance of 24 different balance tasks, and to evaluate the reliability of different measures of postural sway...
July 10, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809103/decision-making-influences-tibial-impact-accelerations-during-lateral-cutting
#12
Logan A Lucas, Benjamin S England, Travis W Mason, Christopher R Lanning, Taylor M Miller, Alexander M Morgan, Thomas G Almonroeder
Lower extremity musculoskeletal injuries are common in sports such as basketball and soccer. Athletes competing in sports of this nature must maneuver in response to the actions of their teammates, opponents, etc. This limits their ability to pre-plan movements. The purpose of this study was to compare impact accelerations during pre-planned vs. un-planned lateral cutting. Thirty subjects (15 males, 15 females) performed pre-planned and un-planned cuts while we analyzed impact accelerations using an accelerometer secured to their tibia...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809100/concurrent-validity-of-a-portable-force-plate-using-vertical-jump-force-time-characteristics
#13
Jason Lake, Peter Mundy, Paul Comfort, John J McMahon, Timothy J Suchomel, Patrick Carden
This study examined concurrent validity of countermovement vertical jump (CMJ) reactive strength index modified and force-time characteristics recorded using a one dimensional portable and laboratory force plate system. Twenty-eight men performed bilateral CMJs on two portable force plates placed on top of two in-ground force plates, both recording vertical ground reaction force at 1000 Hz. Time to take-off, jump height, reactive strength index modified, braking and propulsion impulse, mean net force, and duration were calculated from the vertical force from both force plate systems...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809093/determination-of-ankle-and-metatarsophalangeal-stiffness-during-walking-and-jogging
#14
Fabian Mager, Jim Richards, Malika Hennies, Eugen Dötzel, Ambreen Chohan, Alex Mbuli, Felix Capanni
Forefoot stiffness has been shown to influence joint biomechanics. However, little or no data exists on metatarsophalangeal stiffness. Twenty-four healthy rearfoot strike runners were recruited from a staff and student population at the University of Central Lancashire. Five repetitions of shod, self-selected speed level walking and jogging were performed. Kinetic and kinematic data were collected using retro-reflective markers placed on the lower limb and foot, to create a three-segment foot model using the Calibrated Anatomical System Technique...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809090/muscle-activity-timing-and-head-kinematics-differ-between-male-and-female-ice-hockey-players-during-sudden-head-perturbations
#15
Chadwick Debison-Larabie, Bernadette A Murphy, Michael W R Holmes
This study examined sex differences in head kinematics and neck muscle activity during sudden head perturbations. Sixteen competitive ice hockey players participated. Three muscles were monitored bilaterally using surface electromyography: sternocleidomastoid (SCM), scalene (SCL) and splenius capitis (SPC). Head and thorax kinematics were measured. Head perturbations were induced by the release of a 1.5kg weight, attached to a wire wrapped around an adjustable pulley secured to the participant's head. Perturbations were delivered in 4 directions (flexion, extension, right and left lateral bend)...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809083/evaluating-performance-during-maximum-effort-vertical-jump-landings
#16
John R Harry, Leland A Barker, Jeffrey D Eggleston, Janet S Dufek
The ability to rapidly complete a jump-landing has received little attention in the literature despite the need for rapid performance in a number of sports. As such, our purpose was to investigate differences between groups of individuals who land quickly (FAST) and slowly (SLOW) relative to peak vertical ground reaction forces (vGRF), loading rates, rates of vGRF attenuation, contributions to lower extremity mechanical energy absorption at the involved joints, and the onsets of preparatory joint flexion/dorsiflexion...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809082/opensim-versus-human-body-model-a-comparison-study-for-the-lower-limbs-during-gait
#17
Antoine Falisse, Sam Van Rossom, Johannes Gijsbers, Frans Steenbrink, Ben J H van Basten, Ilse Jonkers, Antonie J van den Bogert, Friedl De Groote
Musculoskeletal modeling and simulations have become popular tools for analyzing human movements. However, end-users are often not aware of underlying modeling and computational assumptions. This study investigates how these assumptions affect biomechanical gait analysis outcomes performed with Human Body Model and the OpenSim gait2392 model. We compared joint kinematics, kinetics, and muscle forces resulting from processing data from seven healthy adults with both models. Although outcome variables had similar patterns, there were statistically significant differences in joint kinematics (maximal difference: 9...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809081/prediction-of-knee-joint-contact-forces-from-external-measures-using-principal-component-prediction-and-reconstruction
#18
Christopher M Saliba, Allison L Clouthier, Scott C E Brandon, Michael J Rainbow, Kevin J Deluzio
Abnormal loading of the knee joint contributes to the pathogenesis of knee osteoarthritis. Gait retraining is a non-invasive intervention that aims to reduce knee loads by providing audible, visual, or haptic feedback of gait parameters. The computational expense of joint contact force prediction has limited real-time feedback to surrogate measures of the contact force, such as the knee adduction moment. We developed a method to predict knee joint contact forces using motion analysis and a statistical regression model that can be implemented in near real-time...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809079/effect-of-impact-mechanism-on-head-accelerations-in-men-s-lacrosse-athletes
#19
Lydia R Vollavanh, Kathleen M O'Day, Elizabeth M Koehling, James M May, Katherine M Breedlove, Evan L Breedlove, Eric A Nauman, Debbie A Bradney, J Eric Goff, Thomas G Bowman
Quantifying head impacts is a vital component to understanding and preventing head trauma in sport. Our objective was to establish the frequency and magnitude of head impact mechanisms in men's lacrosse athletes. Eleven male lacrosse athletes wore xPatch sensors during activity. Video footage of practices and games was analyzed to verify impacts and code them with impact mechanisms. We calculated incidence rates (IR) per 1000 exposures with corresponding 95% confidence intervals (CIs) and used MANOVAs to compare the linear (g) and rotational (rad/sec2) accelerations between mechanisms...
May 29, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29809078/a-comprehensive-method-to-measure-three-dimensional-bra-motion-during-physical-activity
#20
Elisa S Arch, Sarah Colόn, James G Richards
Breast and bra motion research aims to understand how the breasts/bra move to aid development of apparel that minimizes motion. Most previously-published research has tracked nipple motion to represent bra motion. However, this method does not provide information regarding regional tissue motion. A more comprehensive approach might facilitate understanding how the entire soft tissue mass moves during physical activities. This study developed and tested an objective method to comprehensively measure three-dimensional bra motion, including regional displacement and velocity, displacement phasing, and surface stretch...
May 29, 2018: Journal of Applied Biomechanics
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