Effect of dual-task and visual manipulation on the balance of older physical exercise practitioners and sedentary older and young adults
The objective was to compare the effect of dual-task and visual manipulation on postural balance of older physical activity practitioners and older and young adult non-practitioners. Fifty-one subjects were divided into four groups: Older Practitioners of Karate (OPK), Older Practitioners of Functional Gymnastics (OPG), Non-practicing Older Adult Group (ONP), and Non-practicing Young Adult Group (YNP). The task was to remain in an upright, static position on a force platform, for 40 seconds, with and without a cognitive dual-task, by means of an arithmetic sum, and visual manipulation, with and without a blindfold. The analyzed variables of the Center of Pressure (COP) were: area of oscillation and mean amplitude of oscillation, in the mediolateral and anteroposterior directions. The results showed similar performances among the physical exercise groups (OPK and OPG) and the young adults (YNP), while the ONP presented greater postural oscillation in all conditions. In the visual condition, blindfolded, in the condition with the dual-task, the OPK, OPG, and YNP groups oscillated less, when compared to the condition without dual-task. Thus, it can be inferred that the practice of physical exercises, regardless of the modality, is effective in improving the postural control of older adults, with similar performances to the group of young adults, even in conditions with dual-task and sensory manipulation of vision.
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