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http://dx.doi.org/10.3795/KSME-B.2011.35.11.1243

Effect of a Elderly Walker on Joint Kinematics and Muscle Activities of Lower Extremities Using a Human Model  

Shin, Jun-Ho (Dept. of Mechanical Engineering, Kyung Hee Univ.)
Kim, Yoon-Hyuk (Dept. of Mechanical Engineering, Kyung Hee Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.11, 2011 , pp. 1243-1248 More about this Journal
Abstract
The purposes of this study were to develop a dynamic model of a human and to investigate the effect of a walker on an elderly subject's motions, such as sit-to-stand (STS) motion and normal gait, by using this model. A human model consisting of 15 segments and 14 joints was developed, embedded in $RecurDyn^{TM}$, and connected through a Simulink$^{(R)}$ interface with collected motion data. The model was validated by comparisons between joint kinematic results from inverse dynamics (Matlab$^{(R)}$-based in-house program) and from $RecurDyn^{TM}$ simulation during walking. The results indicate that the elderly walker induced a longer movement time in walking, such that the speed of joint flexion/extension was slower than that during a normal gait. The results showed that the muscle activities of parts of the ankle and hamstring were altered by use of the elderly walker. The technique used in this study could be very helpful in applications to biomechanical fields.
Keywords
Human Model; Motion Analysis; Elderly Walker; Gait; Sit-To-Stand; EMG;
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