<Originals>Recreational Underwater Exercise Facilitates the Sleep Continuity in Physically Untrained Males

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In this paper, we examined the effects of recreational underwater exercise (UWE) on sleep. Physically untrained male college students participated in the UWE program in the evening at a health resort facility. UWF, was performed in thermoneutral water (34℃) and the subjects followed an instructor's directions. The program was divided into two sessions. An aqua trim exercise consisted of slow gymnastic exercises and an aqua aerobic exercise consisted mostly of rapid aerobic dances. After UWE, the subjects were studied with nocturnal polysomnography at home. The nocturnal sleep data following UWE were compared with those following a day of routine activity in which exercise was not practiced on the control night. Heart rate during UWE showed that the intensity of exercise was low to moderate. From sleep results, the time in stage 1 (p=0.03) and sleep disturbance (movement time and stages W and 1 combined, p=0.03) on the UWE night were significantly shorter than those on the control night. On the other hand, no significant differences were found in the time of SWS (slow wave sleep) or REM (rapid eye movement) sleep. These results inducate that recreational UWE of low to moderate intensity may improve the sleep continuity rather than cause changes in the sleep patter.
日本運動生理学会の論文