EFFECT OF DAYTIME EXERCISE ON SLEEP EEG AND SUBJECTIVE SLEEP

• Published in: Journal of sound and vibration 1997-08, Vol.205 (4), p.393-403
• Main Authors: Sasazawa, Y., Kawada, T., Kiryu, Y.
• Format: Article
• Language: English
• Subjects: Activity levels. Psychomotricity; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Psychology. Psychoanalysis. Psychiatry; Psychology. Psychophysiology; Vigilance. Attention. Sleep
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1006/jsvi.1997.1004

This study was designed to assess the effects of daytime physical exercise on the quality of objective and subjective sleep by examining all-night sleep EEGs. The subjects were five male students, aged 19 to 20 years, who were in the habit of performing regular daytime exercise. The sleep polygraphic parameters in this study were sleep stage time as a percentage of total sleep time (%S1, %S2, %S(3+4), %SREM, %MT), time in bed (TIB), sleep time (ST), total sleep time (TST), sleep onset latency (SOL), waking from sleep, sleep efficiency, number of awakenings, number of stage shifts, number of spindles, and percentages of α and δ waves, all of which were determined by an automatic computer analysis system. The OSA questionnaire was used to investigate subjective sleep. The five scales of the OSA used were sleepiness, sleep maintenance, worry, integrated sleep feeling, and sleep initiation. Each sleep parameter was compared in the exercise and the non-exercise groups. Two-way analysis of variance was applied using subject factor and exercise factor. The main effect of the subject was significant in all parameters and the main effect of exercise in %S(3+4), SOL and sleep efficiency, among the objective sleep parameters. The main effects of the subject, except sleepiness, were significant, as was the main effect of exercise on sleep initiation, among the subjective sleep parameters. These findings suggest that daytime exercise shortened sleep latency and prolonged slow-wave sleep, and that the subjects fell asleep more easily on exercise days. There were also significant individual differences in both the objective and subjective sleep parameters.