Article

The aim of the study was to evaluate the influence of the physiological load on
postural control. Special attention was directed toward the identifying the
intensity level in which the major deterioration in balance abilities occurs.
Thirty subjects randomly divided into two groups performed multistage all-out
exertion protocol on cycle-ergometer with measurements of ventilatory-metabolic
and subjective parameters of exertion. Each stage lasted three minutes and was
followed with three minute breaks during which the subjects underwent the static
(keeping the cursor in the center of the screen) and the dynamic balance testing
(following the cursor clockwise or counter clock wise by body movements) on
balance platform. In a control group, the protocol encompassed only balance
testing procedures followed by 3 min rest. After the completion of the testing
procedures, the five intensity zones were determined according to the
ventilatory-metabolic parameters. The significant differences in both static and
dynamic balance tests were found between the test stages in exercising group. The
post hoc analyses revealed the significant negative effect of exercise on the
static balance with three visible "balance thresholds".
The first threshold was
at the rest to work transition,
the second at the anaerobic threshold and the
third at the maximal exertion level. The dynamic balance was also negatively
affected with exercise, however no "balance thresholds" were clearly identified.
No significant changes in neither static nor dynamic balance abilities were
observed in the control group so the changes in the experimental group could have
been attributed to the exercise intensity.
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Langue : ANGLAIS