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Chinese Journal of Rehabilitation Medicine, 37(11), 1471–1477p. (2022) DOI:10.3969/j.issn.1001-1242.2022.11.006
Objective: To explore the effects of aging on human standing balance control ability.
Method: Fourteen elderly people and 14 young people were recruited for the reaching forward experiment. The 95% confidence ellipse area，mean distance and mean speed of the center of pressure （COP） signals of the whole body，left foot and right foot during the maintenance of the stability limit were calculated. The COP signal was analyzed by detrended fluctuation analysis and cross recurrence quantification analysis simultaneously.
Result: Compared with the youth group，the 95% confidence ellipse area of COP signal in the whole body and right foot，the mean distance and mean speed in the whole body，left foot and right foot in the elderly group increased significantly. The scale index values of COP signal in the whole body and left foot of the elderly group increased significantly. In the elderly group，the determinism of COP signal pairs in the left and right foots，the entropy in the left foot，the degree of recursion in the whole body and right foot，and the mean diagonal length in the whole body，left foot and right foot increased significantly；and these parameters were significantly increased in the inter foot COP signal pair in the elderly group.
Conclusion: The path deviation of COP trajectory increases and the balance control accuracy decreases in the elderly. The dynamic structure of COP signal in the elderly is more regular and determined，the motion control mode is rigid，the adaptability to balance disturbance is reduced，and the probability of falling is increased. This study reveals the impact of aging on the stability of dynamic balance，and provides new insights for the accurate and objective evaluation of standing balance ability and the prevention of fall risk in the elderly.
© 2024 SOME RIGHTS RESERVED
The content of this web site is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 2.0 Germany License.
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