Effects of fatigue recovery by HSP expression and possibility of effective muscular strength

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The purpose of this study was to examine the effect of different types of bathing on responses to sleep in colligatecompetitive swimmers. Twelve healthy colligate competitive swimmers were participated inthis study. The subjects were taken two different types of bathing; whole body immersion bathing (WBIB) and shower bathing (SB). The water temperature of both bathing was 42 degrees Celsius. To measure the sleep-wake cycle, accelerometers (Lifecorder GS, SUZUKEN, Japan) was used. The sleep - wake data were analysed by circadian rhythm analysis software (SleepSign Act, KISSEI COMTEC, Japan). Analysed a sleep variables were time in bed (TIB), sleep period time (SPT), total sleep time (TST), wake time after sleep onset(WASO), sleep efficiency (SE), sleep latency (SL), time of sleep onset, time of wake onset, and bed out latency (BOL). SL was significantly shorter (p < .05) in WBIB than that in SB. SE was significantly higher (p < .05) in WBIB than that in SB. SPT was significantly longer (p < .05) in WBIB than that in SB. Therefore, these results suggest that as WBIB could raise body core temperature enough, this hyperthermia may cause a deep sleep. The sleep after the WBIB seems to be extremely useful in the recovery from fatigue.