Article

Force platform biofeedback training, whereby concurrent visual feedback of the
centre of pressure (COP) is provided, has previously been used for balance
training. Since the goal of balance is to maintain control of the centre of
gravity (COG), specific feedback of the COG may be more likely than COP feedback
to improve overall balance control. The purpose of this study was to compare the
effect of concurrent visual feedback of the COP versus COG on postural control
during a novel quiet standing task. Thirty-two young healthy adults (20-35 years
old) were recruited. Participants were randomly assigned to receive concurrent
visual feedback of either the COP or COG while standing on a foam pad. Training
occurred over one session (20-30-second trials). Retention and transfer testing
(i.e. without concurrent visual feedback) occurred after approximately 24h.
Variability of the COG decreased, variability of COP-COG increased, and sample
entropy increased with concurrent visual feedback. With practice, variability of
COP, COG and COP-COG decreased whereas sample entropy increased. The decrease in
variability of COP-COG was greater for those who received COG feedback than those
who received COP feedback. Training effects on COP, COG and COP-COG variability
were not retained after 24h and removal of visual feedback. However, on retention
and transfer testing, sample entropy was significantly higher than on baseline
testing, indicating more 'automatic' postural control. These results suggest that
concurrent visual feedback of neither the COP nor COG is superior for improving
quiet standing balance control.
CI - Copyright (c) 2014 Elsevier B.V. All rights reserved.

Langue : ANGLAIS