EFFECTS OF DAYTIME ACTIVITIES ON SLEEP QUALITIES

In order to study effects of daytime activities on sleep, eleven healt hy male university students (aged 19-25) spent three different activit ies days; the mentally and physically relaxation day, the mental activ e day, and the physical active day. Their sleep were recorded in the n ights after these three different days. The large amount of slow wave sleep (SWS) concentrated on the first sleep cycle in the night after t he physically active day. The individual differences in body temperatu re curve during a night became large in the order of the night after t he physical active day, the night after the mental active day, and the night after the mentally and physically relaxation day. These results suggest that an active day not only leads to a good quality of sleep, but also stabilizes the circadian body temperature curve.