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This study addressed the biomechanical effect of varying forefoot stiffness in a foot prosthesis during different ambulation tasks. The external mean ankle moment arm (EMAMA) outcome measure captures the mean dynamic effects of changes in center of pressure (CoP) that impact body dynamics. Findings ...
Few studies have examined the frontal-plane biomechanics of the hip during stationary cycling. Additionally, very few studies have examined adjusting saddle height on the frontal-plane biomechanics of the hip joint. This study examined the impact of adjusting saddle height based on knee flexion angl...
Due to changes in segmental volume and mass during weight loss, the role of body weight per se on gait characteristics in obesity is poorly understood. We measured lower extremity EMG activity and sagittal plane joint angles in obese women (N=3) walking on a positive-pressure treadmill (0 and 25% bo...
Mechanical fatigue is the predominant etiology of stress fracture but the mechanism governing the fatigue failure of bone is poorly understood. Recent work from our lab suggests that intracortical microarchitecture is strongly associated with the fatigue life of bone. Vascular canals induce stress c...
We used finite element analysis to compare the effects of different support conditions on compression fractured vertebras. The results showed that front support is a better design for expandable bone implant systems.
Basketball is a sport that requires a high level of cognitive and mental effort. This mental effort might affect to technical skills such as shooting. Shooting depends on biomechanical factors that determine the path, accuracy, and performance. There is evidence that mental load and fatigue may caus...
The purpose of this study was to investigate the changes in the knee joint mechanics in the frontal plane induced by two typical exercise-induced fatigue protocols. Fifteen trained male athletes were recruited. Frontal plane knee joint kinematics and ground reaction forces were recorded. No signific...
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...
Visualisation is the connection of biomechanical analysis and virtual reality. This produces real-time results, by accurately monitoring movement and progress, using virtual reality to create a diverse, challenging, and controllable environment, representative of real-world situations [1]. This stud...
Human induced pluripotent stem cell-derived cardiomyocyte (hiPSC-CM) tissue consists of heterogeneous CMs coupled by gap junctions. Electromechanical effects of these couplings are estimated using a computer model. Simulations suggest that the electromechanical variability in the tissue is decreased...
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...
The aim of this study was to investigate the effects of inclined walking on muscle activation level of biceps femoris (BF), soleus (SOL), and tibialis posterior (TP). Subjects included 28 able-bodied volunteers walked at the level and inclined self-paced instrumented treadmill. Uphill walking increa...
It is well known that the force production of the muscle is history-dependent. The steady-state isometric force following an active shortening or lengthening contraction is smaller (force depression) or greater (residual force enhancement) compared to an isometric reference contraction. However, it ...
Inter-limb leg stiffness changes during weight transfer of gait were used to evaluate the efficacy of surgical treatments on body support strategies in children with diplegic cerebral palsy (DCP). Compared to Controls, children with DCP were found to have similar linter-limb leg stiffness sharing du...
In order to reduce the congestion related injuries in greyhound racing, a study was designed to verify the effect of the number of starters on greyhound racing dynamics. The results showed that the injury rates of races with 6 are lower compared to 7 and 8 start races. With 6 greyhounds in a race wh...
This study explores the potential benefits of interacting with variable damping-defined environments to improve the trade-off between mediolateral ankle agility and stability in the frontal plane standing. While wearing an exoskeletal robot supported by a knee brace, subjects were instructed to move...
Upon completion of a treadmill-based running retraining that focused on promoting a midfoot strike landing, reduced foot-strike angle and vertical instantaneous loading rates were observed in habitual rearfoot strike runners. We sought to measure whether these modified gait mechanics could be transf...
Trabecular morphology correlates with the stiffness and strength of the cancellous bone. The present study aims to investigate the differences in the elastic modulus and nanostructure between the rod- and plate-like trabeculae. We dissected 37 rod-like and 11 plate-like trabeculae from the proximal ...
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...
This experiment aims to determine the connection between auditory cueing and how a person’s gait adjusts to the cadence of a metronome. In this study, eight healthy young participants walked at their preferred cadence and at a calculated rate of 20% increased and decreased cadence. We found that d...
This study examined the effect of heel-toe drop (HTD) on lower extremity kinematic and kinetics change when walking uphill. Ten healthy males walked uphill in identical shoes with varying HTD (0-mm, 15-mm and 30-mm). The present results revealed that participants with 30-mm HTD displayed significant...
This study aims to understand the influence of spine modelling and marker placement on the execution of the inverse kinematics (IK) process in OpenSim. IK adjusts the model at each time step best matching the marker data while remaining kinematically feasible, correcting for experimental error. Anal...
The influence of subtalar arthrodesis on the anteroposterior stiffness and laxity of the talocrural joint was studied in vitro. Six fresh-frozen ankle specimens with soft tissues removed following standard specimen preparation procedure were tested by a robot-based joint testing system (RJTS) which ...
Studies showed that a constant forward traction force applied at the waist can reduce metabolic cost. However, there is limited information about the effects of non-constant forces. Our aim was to investigate the effects of timing and magnitude of different forward force profiles on metabolic cost. ...
Strokes are one of the leading causes of death for Hispanics living in the United States. Falling is the most frequent complication experienced by individuals with stroke, both in a hospital and community setting. The risk for falls among persons with stroke is greater compared to age-matched health...
Platelet-rich plasma (PRP) and matrix metalloproteinase inhibitors (MMPIs) have been used as therapeutic options for tendinopathy. However, mixed results have been reported regarding their efficacy. We posited that the combination of these two treatment strategies would be more beneficial for healin...
The progressive declines in motor function of multiple sclerosis (MS) are typically preceded by decreases in sensory function. The goal of our study was to evaluate the influence of a treatment that targets sensory nerve fibers (augmented Transcutaneous Electrical Nerve Stimulation; aTENS) on mobili...
The objective of this study was to verify the reproducibility of a joint stress protocol previously to the electromyographic evaluations in subjects with PFD. Twenty women with PFD where evaluated through presence of pain, questionnaires, specific clinical tests for PFD, and superficial electromyogr...
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