Controle postural e fragilidade: efeitos de diferentes tarefas e de um treinamento multicomponente

Abstract

The frailty syndrome is highlighted both the aging process, since it has adverse outcomes such as death, hospitalization, institutionalization, falls and functional dependence. In this syndrome there would be a greater reduction of the physiological reserves and difficulty in maintaining the homeostasis due to a reduction of the physiological complexity. Since fall is an important outcome in this syndrome, it would be interesting to evaluate the postural control through measures of complexity and in challenging conditions, not only at rest. Thus, the Study I, titled "Impact of different demands on the postural control of prefrail older adults", aimed to compare the complexity of center of pressure (CoP) displacements of prefrail older adults in response to different stimuli: visual deprivation, cognitive demand and postural change. The results showed that the complexity of CoP displacement remained the same after the postural transition in the anteroposterior (AP) direction, as well as in tasks with closed eyes and with cognitive demand in the mediolateral (ML) direction. It is suggested that these activities could be added into rehabilitation programs for this population. As transitions between frailty stages are spontaneous, measures that may reduce the progression of frailty, such as exercise, should be taken into account. Thus, the Study II entitled "Effect of multicomponent training in postural oscillation complexity in prefrail older adults" aimed to investigate the effect of a multicomponent intervention (aerobic, balance, resistance and flexibility exercises) on the complexity and traditional measures of CoP displacements in the AP and ML directions with the eyes open and closed. The data showed that multicomponent training improved the integration of systems that control the prefrail balance, especially in challenging conditions, such as with closed eyes.