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http://dx.doi.org/10.5103/KJSB.2019.29.2.113

Complexity Comparison of Center of Pressure between Fallers and Non-fallers during Gait  

Park, Sang Kyoon (Department of Physical Education, College of Sport Science of Korea National Sport University)
Ryu, Sihyun (Motion Innovation Centre, Korea National Sport University)
Kim, Jongbin (Motion Innovation Centre, Korea National Sport University)
Yoon, Sukhoon (Department of Community Sport, Korea National Sport University)
Ryu, Jiseon (Department of Health and Exercise Science, College of Lifetime Sport of Korea National Sport University)
Publication Information
Korean Journal of Applied Biomechanics / v.29, no.2, 2019 , pp. 113-119 More about this Journal
Abstract
Objective: The purpose of this study was to investigate the effect of the falls on the center of pressure (CoP) complexity during gait using non-linear approximate entropy (ApEn). Method: 20 elderly women with experience of falling ($age=72.55{\pm}5.42yrs$; $height=154.40{\pm}4.26cm$; $body\;weight=57.40{\pm}6.21kg$; $preferred\;gait\;speed=0.52{\pm}0.17m/s$) and 20 elderly women with no experience of falling ($age=71.90{\pm}2.90yrs$; $height=155.28{\pm}4.73cm$; $body\;weight=56.70{\pm}5.241kg$; $preferred\;gait\;speed=0.56{\pm}0.13m/s$) were recruited for the study. While they were walking at their preferred gait speed on a treadmill (instrumented dual belt treadmills, Bertec, USA) with a force plate CoP data were collected for the 20 strides. The complexity of the CoP was analyzed using the ApEn technique. Results: The ApEn of the medial-lateral CoP in the fallers showed smaller about 16% compared to the non-fallers (p<.05). The ApEn of the antero-posterior CoP of the fallers showed smaller about 12% compared to the non-fallers, but the difference was not statistically significant. Conclusion: Based on the results of this study, the reduction of the medio-lateral CoP complexity in the elderly gait would be an index to determine the potential fall.
Keywords
Complexity; Center of pressure; Approximate entropy; Fall; Gait;
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