Alterações no controle postural resultantes de exercícios extenuantes de membros inferiores

Abstract

This study was to evaluate the effects of running and cycling on the control of standing posture. Fifteen male subjects were evaluated after strenuous exercise in treadmill and cycle ergometer. Running protocol started after 3 min warm-up at 5 km.h-1 with initial velocity of 7 km.h-1 with increments of 1 km.h-1 every minute until voluntary exhaustion. Cycling protocol started with warm up of 3 min at 50W with workload increased from 95W until exhaustion with increments of 35 W every minute. Subjects maintained pedaling cadence above 70 rpm. Before the protocols (PRE) the standing posture was analyzed by COP analysis. Immediately after the protocols, three trials with 5s interval between them were performed (POS1, POS2, POS3). At the end of the exercises, subjects presented heart rate higher than 90% of their maximal heart rate. There were significant increase (p <0.01) in area and length of the path of the COP when compared to the situation PRE-and POS1 for both cycling and running. There also was a significant difference when compared the situation POS1 between running and cycling (p <0.01). The situation POS3 did not differ of rest (p=0172) for both exercise. It was concluded that running exhaustion results in higher changes of COP than cycling, and for both exercise fatigue effects were quickly recovered.