Age-Related Changes in Distance From Center of Mass to Center of Pressure During One-Leg Standing |
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Authors: | Hiroki Mani Shih-Fen Hsiao Kenta Takeda Naoya Hasegawa Mitsuhisa Tozuka Akiyo Tsuda |
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Affiliation: | 1. Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan;2. Department of Physical Therapy, College of Health Sciences, Kaohsiung Medical University, Taiwan |
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Abstract: | ABSTRACT. The purpose of this study was to clarify the age-related effects of distances from the center of pressure (COP) to the center of mass (COM) (COP-COM distances) during one-leg standing (OLS) task. Healthy old and young adults (n = 11 each) participated in this study. The authors divided the task into 3 phases (accelerated, decelerated, and steady) based on the relationship between COM and COP. COP-COM distances in the older group were significantly reduced during the accelerated phase, then significantly increased during the decelerated and steady phases. Furthermore, distances during these phases correlated inversely with OLS time. The authors conclude that OLS time is shortened by the larger braking response to COM shifts just after leg-lifting, and the production of larger inertial forces to maintain COM position during the OLS in older individuals. |
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Keywords: | balance elderly center of mass center of pressure |
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