| Keywords |
Sleep pattern ; Exercise ; nonREM ; Rapid eyes movement(REM) ; Slow-wave sleep |
| Abstract |
The purpose of this study was to examine the effect of intensive exercise prior to bedtime on sleep pattern. The subjects of present study were 7 male university students. All subjects participated in VO2 max test to calculate their 80% VO2 max workload. One bout exercise were continued until subjects stopped because of fatigue. To discriminate between wakefulness and sleep, and to identify sleep stages, we performed measurement of electroencephalogram(EEG), electromyogram(EMG), and electrooculogram(EOG) using standardized procedures. The experimental conditions were divided into 2 treatments(normal sleep, sleep after exercise). There were significant differences between experimental conditions in the time of total sleep time(TST), sleep onset(SO), rapid eyes movement(REM), REM cycle, slow-wave sleep(SWS), and wake time(WT)(p<.05) These results demonstrate that exercise prior to bedtime significantly increased time of SWS and deceased time and frequency of REM. Of particular significant is to focus on time and frequency of REM as well as time of SWS. In general terms, the optimal physical performance time is very important to keep the circadian rhythm for the body's homeostasis, and also, training program of circadian rhythm adaptation is needed for sleep quality and exercise performance. |