Journal of Applied Physiology
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J Appl Physiol 44: 945-951, 1978;
8750-7587/78 $5.00
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Journal of Applied Physiology, Vol 44, Issue 6 945-951, Copyright © 1978 by American Physiological Society

ARTICLES

Effects of exercise on sleep

J. M. Walker, T. C. Floyd, G. Fein, C. Cavness, R. Lualhati and I. Feinburg

We tested the hypothesis that EEG sleep stages 3 and 4 (slow-wave sleep, SWS) would be increased as a function of either acute of chronic exercise. Ten distance runners were matched with 10 nonrunners, and their sleep was recorded under both habitual (runners running and nonrunners not running, 3 night) and abruptly changed (runners not running and nonrunners running, 1 night) conditions. Analyses of both visually scored SWS and computer measures of delta activity during non-rapid eye-movement (NREM) sleep failed to support the SWS-exercise hypothesis. The runners showed a significantly higher proportion and a greater absolute amount of NREM sleep than the nonrunners. The runners showed less rapid eye-movement activity during sleep than the nonrunners under both experimental conditions, indicating a strong and unexpected effect of physical fitness on this measure. Modest afternoon exercise in nonrunners was associated with a strong trend toward elevated heart rate during sleep. Mood tests and personality profiles revealed few differences, either between groups or within groups, as a function of exercise.


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C. Shapiro, R Bortz, D Mitchell, P Bartel, and P Jooste
Slow-wave sleep: a recovery period after exercise
Science, December 11, 1981; 214(4526): 1253 - 1254.
[Abstract] [PDF]


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