EFFECT OF AEROBIC TRAINING UNDER HIGH TEMPERATURES ON CARDIAC FUNCTION IN WISTAR RATS

Aerobic training in hot environments is responsible for changes which impact cardiac function, especially in athletes. The increase in plasma volume at an early stage and changes in autonomic modulation signal provoked stress, which results in reduced performance. The thermoregulatory mechanisms responsible for the reduction of core body temperature depend on adaptation to be able to meet the demand imposed by vigorous exercise, of long duration and under strong heat. Cardiac function under these conditions is impaired and needs to be clarified to allow adequate planning regarding the time and intensity of exposure to heat during the training period that precedes a competition.