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Different foot types are associated with different biomechanical function [1]. In a cohort of cadets from West Point differences in foot type have already been observed across sex, race, injury incidence [2]. As part of their training to become officers in the US Army cadets train rigorously, especi...
Decreased physical activity throughout ontogeny results in decreases of peak vertical jumping performance but does not alter sub-max VO2 in a bipedal animal model.
Due to the increase of deskbound workstyles, there has also been an increase in sedentary behaviour. Walking workstations have been shown to decrease the amount of sedentary time and increase caloric expenditure to combat consequences of sedentary workstyles. Due to the dual-task involved in walking...
This preliminary study investigated the effects of fatigue on hand and wrist biomechanics in a simulated workplace setting to gain insight into repetitive use injuries of the upper extremity. Grip forces, wrist muscle activity and wrist kinematics were measured pre- and post-fatigue during an object...
The aim of this study was to investigate the effect of Kinesio taping (KT) on female college students by fatigue intervention, on stop-jump task. Eleven female athletes served as subject. Two force plates and ten cameras were synchronized to capture the stop-jump task. The kinematics results found t...
Q-Factor (QF) refers to the frontal-plane inter-pedal distance of a bicycle or cycle ergometer. The purpose of this research was to examine the effects of increasing QF on frontal plane knee biomechanics during cycling.
The magnitude and complexity of skeletal muscle force variability has been shown to change e.g. with different force levels [1], with fatigue [1], and with ageing. The purpose of this study was to use motor unit models to determine how the location of noise inputs affect variability at different act...
Individuals encounter obstacles while walking through their environment on a regular basis, correct navigation of which requires correct visual perception of the obstacle and an appropriate biomechanical crossing strategy. In a physically fatigued state, environmental navigation can potentially pose...
A passive strain sensor was developed to wirelessly measure musculoskeletal soft tissue strains in vivo. The sensor sensitivity and signal stability were evaluated under uniaxial strain. The feasibility of wireless tendon strain measurement was successfully demonstrated by implantation in an ovine c...
Although the concept of coordination has received much attention, research on bilateral coordination between limbs has been focused on the upper extremity and reciprocal motion of the lower extremity. The bilateral occurrence of ground reaction forces presents an opportunity to investigate kinetic b...
Knee joints undergo various loading and unloading processes. Earlier investigations had a marginal focus on rate-dependent load response associated with viscoelastic and poromechanical behaviors of the joint. In this study, a fully meniscectomized porcine knee joint compression was simulated with a ...
Models that can predict the risk of herniation or re-herniation can aid in the development of surgical and rehabilitative treatments. Despite an abundance of computational spine models, there are none that have been specifically developed and validated to predict the risk of IVD herniation. Therefor...
The purpose of this study to explore the effect of a 12-week gait retraining program with the minimalist shoes on impact force and lower limb biomechanics. We found that the 12-week gait retraining program with minimalist shoe could effectively convert the rearfoot strike runners who used to wear cu...
In the current study, a combined experimental and computational approach to investigate the effect of individual lumbar vertebral postures on lumbar spine injury risk under high-speed vertical acceleration was conducted. Specimen-specific finite element (FE) models of 3-segment functional spinal uni...
The purpose of this research is to evaluate the influence of surface condition of culture substrate on cell adhesion, cell activity and cell differentiation. It is well known that photofunctionalization on surfaces promotes the osteogenesis. It is common knowledge that cells strongly adhere to UV ir...
We report frontal plane knee and ankle angulations from a study of incremental lateral wedging on joint biomechanics during walking. Trends of increasing ankle eversion were apparent in higher speed walking, whereas knee joint angular changes were of smaller magnitude with only a slight trend toward...
Visual biofeedback was provided to patient who had sustained multi-ligamentous knee injury with tibiofemoral dislocation over the course of 20 sessions across the final 12 weeks of 15 months of rehabilitation. Changes in vertical loading symmetry during jumping and landing tasks were noted with impr...
We propose and evaluate a method for measuring energy exchange between a transtibial prosthesis and the residual limb using only wearable sensors. We reconstruct leg movement from inertial sensors on the foot and shank, and incorporate force and moment from a pylon load cell to compute energy storag...
A new energy storage and return insole has been developed with the goal of reducing musculoskeletal injuries by decreasing impact loads at heel strike while also assisting gait by releasing stored elastic energy during toe off. This pilot study analysed a single subject walking on an instrumented tr...
In ten-pin bowling, bowlers try to knock down ten pins, with the allotted two tries. The present study investigated full-body kinematics and kinetics in the lower extremities in elite ten-pin bowling. Our study showed novel findings regarding how elite bowlers changed kinematics over time during the...
Seven non-radiographic measurement techniques for sagittal thoracic kyphosis were tested for validity against two radiographic techniques. Non-radiographic measurements were taken with a flexicurve ruler and motion-capture markers. Most measures reported fair-good intraclass correlation coefficients...
The metabolic benefit of arm swing arises at and above optimal walking speeds. This benefit is coupled with increases in peak-to-peak arm swing amplitudes.
Ankle range of motion (RoM) may impact knee and hip range of motion in high knee flexion postures (>120°). The purpose of this study was to quantify how differences in ankle sagittal plane RoM affects knee and hip flexion and abduction kinematics. Twenty-eight low and twenty-six high ankle RoM part...
We determined the effects of loss of balance direction and postural perturbation on the perturbation threshold line for lean releases, lean releases with surface translations and surface translations in younger adults, not only for forward but also for the first time for sideways and backward losses...
The aim of the study was to investigate effects of bilateral subthalamic deep brain stimulation (DBS) on lower limb kinematics during sit-to-stand (STS) in patients with advanced Parkinson's disease (PD). Each patient performed STS in a standard gait lab and kinematic analysis were conducted. Result...
Lateral instability of ankle has been shown to be associated with various pathological conditions of ligaments and cartilage. The purpose of the current study was to compare the variations of repeated motions of the ankle joint complex in healthy individuals and patients with lateral ankle instabili...
The Upper Quarter Y-Balance Test (YBT‐UQ) is a closed-chain upper extremity test for assessment of unilateral upper extremity function to identify limitations and asymmetries in the reaching and the stabilizing limb. Whereas several aspects of the test have been examined (reliability, validity, co...
In vivo studies of joint moment-velocity relationships usually do not breakdown the contributions of individual muscles. Namely, force contributions of individual muscles may change according to muscle group isotonic load. To address this question, we measured the in situ force-velocity (F-V) proper...
We assessed the accuracy of non-rigid image registration algorithms to quantify the three-dimensional deformation of the human medial gastrocnemius muscle from MRI scans of the muscle at rest and during isometric contractions at 10% and 20% of maximum voluntary isometric plantarflexion torque. Demon...
This is a biomechanical study evaluating the micromotion of a baseplate in a reverse shoulder arthroplasty during simulated abduction. We tested the following factors: bone density, screw length, number of screws, screw angle, and central peg length. Our findings corroborate the importance of higher...
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