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http://dx.doi.org/10.5103/KJSB.2015.25.3.241

The Theta Analysis on the Components of Ground Reaction Force According to the Ground Conditions During Gait  

Ryew, Che-Cheong (Department of Physical Education, College of Natural Science, Jeju National University)
Hyun, Seung-Hyun (Department of Physical Education, College of Natural Science, Jeju National University)
Publication Information
Korean Journal of Applied Biomechanics / v.25, no.3, 2015 , pp. 241-248 More about this Journal
Abstract
Objective : The purpose of this study was to investigate the theta on the components of ground reaction force according to the ground conditions during gait. Method : Six healthy women(mean age: 22 yrs, mean height: $166.14{\pm}2.51cm$, mean body weights: $56.61{\pm}4.58kg$) participated in this study. The medial-lateral GRF(Fx 1), anterior-posterior GRF(Fy 1, Fy 2), vertical GRF(Fz 1, Fz 2, Fz 3), and impact loading rate were determined from time function and frequency domain. Also, GRF theta were time function and forces. Results : Fx 1, Fy 1 and Fy 2 of stair descending showed significant statistically higher forces than that of level walking, and ascending. Fz 1 of stairs descending showed significant statistically higher forces than that of level walking and stairs ascending(theta $88.62^{\circ}$). Also, Fz 2 of level walking showed significant statistically higher forces than that of stairs ascending and descending(theta $65.78^{\circ}$). Fz 3 of stairs ascending showed significant statistically higher forces than that of level walking and stairs descending($65.26^{\circ}$). Impact loading rate of stairs descending showed significant statistically higher forces than that of level and ascending walking. The GRF showed similar correlation with GRF theta(r=.603) according to the ground conditions during gait. Conclusion : These results suggest that the GRF theta can be used in conjunction with a gait characteristics, prediction of loading rate and dynamic stability.
Keywords
GRF theta; Ground condition; GRF components; Gait;
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