The aim of the present study was to investigate the effects of brief leg cooling during halftime on intermittent exercise performance and physiological responses in warm conditions. Nine male subjects underwent two identical intermittent exercises at 32.0℃ and 80% relative humidity. The intermittent exercises consisted of a series of sixty 5 sec bouts separated by 25 sec active recovery and 30 sec passive recovery between bouts. Subjects rested for 15 min after 30 sets (halftime). Subjects immersed their legs at 16℃ (COOL) or 35℃ (HOT) for 5 min during halftime. Mean power which developed during intermittent exercises, rectal temperature were not significantly different between conditions. Heart rate, mean skin temperature and RPE of COOL were significantly lower than the HOT condition (p < 0.05). These results suggest that halftime brief leg cooling did not enhance intermittent exercise performance, while it influences physiological and subjective responses in a warm environment.

DESCENTE SPORTS SCIENCE Vol.30/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE