Abstract
The purpose of this study was to investigate the identification of distinct characteristics of postural control during transition from a dynamic into a static state in young and older adults. We tested 8 healthy elderly (mean age of 67 yr±0.8) and 8 healthy young (mean age of 23 yr±1.2) adult subjects. After the consent session, all trial participants gave written informed consent if they agreed voluntarily to participate. The subject transitioned from a dynamic state into a static state on the force platform during a step maximally. Center of pressure (COP) from the force platform were recorded during 15s from both feet on the force plat with a sampling frequency of 100 Hz.The anterior-posterior (A-P) and medial-lateral (M-L) direction mean of COP of older adult subjects produced different postural sway and presented significant difference on the distributed value of COP in the quiet standing after the dynamic task, in comparison to the young adult subjects. A-P direction and M-L direction mean of COP was significant difference during the seconds from 0 to 2 (p＜0.05), and 1.5 to 2.5 (p＜0.05), respectively, between young and old subjects. The difference in the mean distance of COP and distributed value of COP between younger and older subjects were revealed by this study. These findings indicate that the development of a simple, non-stressful technique to analyze postural control in older adults is highly useful.
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