J Sleep Res
Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland.
Published: March 2011
Sleep is the most important period for recovery from daily load. Regular physical activity enhances overall sleep quality, but the effects of acute exercise on sleep are not well defined. In sleep hygiene recommendations, intensive exercising is not suggested within the last 3 h before bed time, but this recommendation has not been adequately tested experimentally. Therefore, the effects of vigorous late-night exercise on sleep were examined by measuring polysomnographic, actigraphic and subjective sleep quality, as well as cardiac autonomic activity. Eleven (seven men, four women) physically fit young adults (VO(2max) 54±8 mL·kg(-1)·min(-1) , age 26±3 years) were monitored in a sleep laboratory twice in a counterbalanced order: (1) after vigorous late-night exercise; and (2) after a control day without exercise. The incremental cycle ergometer exercise until voluntary exhaustion started at 21:00±00:28 hours, lasted for 35±3 min, and ended 2:13±00:19 hours before bed time. The proportion of non-rapid eye movement sleep was greater after the exercise day than the control day (P<0.01), while no differences were seen in actigraphic or subjective sleep quality. During the whole sleep, no differences were found in heart rate (HR) variability, whereas HR was higher after the exercise day than the control day (54±7 versus 51±7, P<0.01), and especially during the first three sleeping hours. The results indicate that vigorous late-night exercise does not disturb sleep quality. However, it may have effects on cardiac autonomic control of heart during the first sleeping hours.
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http://dx.doi.org/10.1111/j.1365-2869.2010.00874.x | DOI Listing |
Chronobiol Int
April 2016
Department of Kinesiology and Health Promotion and.
Circadian rhythms are ≈24 h oscillations in physiology and behavior, and disruptions have been shown to have negative effects on health. Wrist skin temperature has been used by several groups as a valid method of assessing circadian rhythms in humans. We tested the hypothesis that circadian temperature amplitude (TempAmp) and stability (TempStab) would significantly differ among groups of healthy young men of varying adiposities, and that we could identify physiological and behavioral measures that were significantly associated with these temperature parameters.
View Article and Find Full Text PDFJ Sleep Res
March 2011
Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland.
Sleep is the most important period for recovery from daily load. Regular physical activity enhances overall sleep quality, but the effects of acute exercise on sleep are not well defined. In sleep hygiene recommendations, intensive exercising is not suggested within the last 3 h before bed time, but this recommendation has not been adequately tested experimentally.
View Article and Find Full Text PDFAm J Physiol Regul Integr Comp Physiol
January 2002
Department of Psychiatry, University of California, San Diego, La Jolla, California 92093-0667, USA.
In a within-subjects (n = 18), counterbalanced design, the circadian phase-shifting effects of 3 h of 1) bright light (3,000 lx) alone 2) and bright light combined with vigorous exercise were compared. For each treatment, volunteers spent 3 nights and 2 days in the laboratory, typically receiving the treatment from approximately 2300 to 0200 on night 2. Bedtimes and waketimes were fixed to the volunteers' habits.
View Article and Find Full Text PDFMed Sci Sports Exerc
June 1999
Department of Psychiatry, University of California, San Diego, La Jolla 92093-0667, USA.
Purpose: This experiment examined the influence of prolonged, vigorous late-night exercise on sleep.
Methods: Sixteen highly fit male cyclists completed each of two 60-h laboratory treatments involving a baseline night, an experimental treatment night, and a recovery night. In counterbalanced order, subjects 1) cycled for 3 h at 65-75% of heart rate reserve combined with bright light exposure (3000 lux) light, and 2) were exposed to a 3 h pulse of bright light (3000 lux) alone.
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