Circadian Characteristics of Older Adults and Aerobic Capacity.

Autor:	Dupont Rocher S; INSERM, U1075 COMETE, Caen, France., Bessot N; INSERM, U1075 COMETE, Caen, France. Université de Caen Basse-Normandie, U1075 COMETE, France. Bessot-n@phycog.org., Sesboüé B; INSERM, U1075 COMETE, Caen, France. Department of Functional Explorations, CHU de Caen, France., Bulla J; Department of Mathematics, University of Bergen, Norway., Davenne D; INSERM, U1075 COMETE, Caen, France. Université de Caen Basse-Normandie, U1075 COMETE, France.
Jazyk:	angličtina
Zdroj:	The journals of gerontology. Series A, Biological sciences and medical sciences [J Gerontol A Biol Sci Med Sci] 2016 Jun; Vol. 71 (6), pp. 817-22. Date of Electronic Publication: 2015 Nov 23.
DOI:	10.1093/gerona/glv195
Abstrakt:	Background: Alteration of circadian rhythmicity with aging might depend on physical aerobic capacity. Methods: Three groups of participants were established based on their peak oxygen consumption (Group 1 < 20mL/min/kg; Group 2 > 20mL/min/kg and <30mL/min/kg; Group 3 > 30mL/min/kg). Each participant had an individual evaluation of their circadian rhythmicity characteristics through two well-known circadian rhythms: core temperature and rest/activity cycles. Nocturnal sleep was also recorded using actimetry and diurnal vigilance tested in a car driving simulator. Results: The amplitude of the oral temperature fluctuations for Group 1 is significantly lower (p < .05) than that of Group 3. Group 2 (p < .01) and Group 3 (p < .05) were significantly more active during the day than Group 1. The index of inactivity during the night for Groups 2 (p < .05) and 3 (p < .01) was higher than Group 1. Results of the car driving simulation showed that for Group 1, the number of lane crossings was significantly higher than Groups 2 (p < .01) and 3 (p < .01). In addition, diurnal vigilance was lower in Group 1. Conclusions: The biological clock seems to be enhanced in older participants with a higher level of physical capacity. (© The Author 2015. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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