Kathleen A. Bieryla

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BACKGROUND AND PURPOSE Numerous interventions have been proposed to improve balance in older adults with varying degrees of success. A novel approach may be to use an off-the-shelf video game system utilizing real-time force feedback to train older adults. The purpose of this study is to investigate the feasibility of using Nintendo's Wii Fit for training(More)
The goal of this study was to determine if practicing recovery from a simulated trip improved the ability of older adults to recover from an actual trip. Twelve healthy older adults ranging in age from 63 to 83 years were randomly assigned to either a control or an experimental group. Each group performed one trip before and one trip after an intervention.(More)
OBJECTIVE To investigate the efficacy of perturbation-based balance training (PBBT) on time to stabilization (TTS) after a nonstepping response to a postural perturbation in older adults at a high risk for falls. DESIGN Single-subject design. Participants completed 4 baseline tests, 1 month of PBBT, and posttraining tests both 1 week and 1 month after(More)
The main purpose of this study was to compare three methods of determining relative effort during sit-to-stand (STS). Fourteen young (mean 19.6+/-SD 1.2 years old) and 17 older (61.7+/-5.5 years old) adults completed six STS trials at three speeds: slow, normal, and fast. Sagittal plane joint torques at the hip, knee, and ankle were calculated through(More)
BACKGROUND Falls are a leading cause of injury and death for old adults, with one risk factor for falls being balance deficits. The low cost (<400 USD), wide availability, and ability to incorporate multiple training paradigms make gaming systems appealing as possible balance intervention tools. AIMS To investigate the feasibility of using the Xbox Kinect(More)
The results of two global optimization algorithms applied to an optimization problem in biomechanics are presented. Of interest is the discovery of the minimum value of an objective function derived from certain performance criteria related to a problem in biomechanics---specifically, a biomedical application called perturbation-based balance training(More)
Following a balance perturbation, a stepping response is commonly used to regain support, and the distance of the recovery step can vary. To date, no other studies have examined joint kinetics in young and old adults during increasing step distances, when participants are required to bring their rear foot forward. Therefore, the purpose of this study was to(More)
This paper is an investigation of low rate loading of the shoulder. The paper first presents a review of the literature on the impact tolerance of the shoulder in high and low rate loading conditions. Currently, there are no injury criteria, nor biofidelic anthropomorphic test dummies for these low rate scenarios. This study investigates dummy loading(More)
Balance-recovery stepping is often necessary for both a human and humanoid robot to avoid a fall by taking a single step or multiple steps after an external perturbation. The determination of where to step to come to a complete stop has been studied, but little is known about the strategy for initiation of forward motion from the static position following(More)
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