Format

Send to

Choose Destination
Physiol Behav. 2015 Mar 1;140:203-8. doi: 10.1016/j.physbeh.2014.12.031. Epub 2014 Dec 22.

Sleep depth and continuity before and after chronic exercise in older men: electrophysiological evidence.

Author information

1
Research Center on Aging, Health and Social Services Centre-University Institute of Geriatrics of Sherbrooke, Sherbrooke, QC, Canada; University of Sherbrooke, Faculty of Physical and Sport Education, Department of Kinanthropology, Sherbrooke, QC, Canada.
2
Research Center on Aging, Health and Social Services Centre-University Institute of Geriatrics of Sherbrooke, Sherbrooke, QC, Canada; University of Sherbrooke, Faculty of Human Sciences, Department of Psychology, Sherbrooke, QC, Canada. Electronic address: Dominique.Lorrain@USherbrooke.ca.

Abstract

During later life sleep depth (slow-wave sleep, SWS) and maintenance exhibit deleterious changes, with possible negative effects on daytime function. This study assessed the effect of chronic, supervised exercise on sleep using laboratory-based polysomnography (PSG) and repeated measures in older adults. Thirteen men aged 64±3served as their own controls and had their sleep measured for a total of 6 nights: 3 before and 3 after the 16-week training intervention. Each sequence involved 1 familiarization trial followed by 2 experimental nights (exercise night; nonexercise night) measured using 13-channel PSG (combined electroencephalography, electromyography, and electro-oculography). The exercise challenges consisted of inclined treadmill brisk walking (60min, 68-69% V˙O2peak). The intervention successfully improved some parameters of aerobic fitness, i.e. ventilatory thresholds 1 and 2 (P<0.05). Acute exercise triggered increases in circulating free fatty acids and lactate levels both at baseline and after the intervention (P<0.05). Noteworthy, acute exercise following training resulted in a 71% increase in SWS during subsequent sleep in comparison with the nonexercise condition before training, respectively 2.4% and 1.4% (P<0.05). Following training, acute exercise reduced total wake time by 30% and REM onset latency by 14% (P<0.05). Acute exercise improved sleep continuity by decreasing total wake time. These results show that aerobic training could increase sleep depth and continuity, during active days, in elderly men. In habitual exercisers, these effects of aerobic exercise on sleep, although modest, might counteract those resulting from aging.

KEYWORDS:

Aging; Chronic exercise; Deep sleep; Physical activity; Senior men; Sleep organization

PMID:
25540930
DOI:
10.1016/j.physbeh.2014.12.031
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center