Exploring the role of sex in the association of late chronotype on cardiorespiratory fitness.

Autor: Thomas JM; Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky, USA.; Department of Biology, University of Kentucky, Lexington, Kentucky, USA.; Center for Clinical and Translational Science, University of Kentucky, Lexington, Kentucky, USA.; Sanders-Brown Center on Aging, University of Kentucky, Lexington, Kentucky, USA., Kern PA; Center for Clinical and Translational Science, University of Kentucky, Lexington, Kentucky, USA.; The Department of Internal Medicine, Division of Endocrinology, University of Kentucky, Lexington, Kentucky, USA.; Barnstable Brown Diabetes Center, University of Kentucky, Lexington, Kentucky, USA., Bush HM; Center for Clinical and Translational Science, University of Kentucky, Lexington, Kentucky, USA.; Department of Biostatistics, University of Kentucky, Lexington, Kentucky, USA., Robbins SJ; Center for Clinical and Translational Science, University of Kentucky, Lexington, Kentucky, USA.; Department of Biostatistics, University of Kentucky, Lexington, Kentucky, USA., Black WS; Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky, USA.; University Health Service, University of Kentucky, Lexington, Kentucky, USA., Pendergast JS; Department of Biology, University of Kentucky, Lexington, Kentucky, USA.; Center for Clinical and Translational Science, University of Kentucky, Lexington, Kentucky, USA.; Barnstable Brown Diabetes Center, University of Kentucky, Lexington, Kentucky, USA.; Saha Cardiovascular Research Center, University of Kentucky, Lexington, Kentucky, USA., Clasey JL; Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky, USA.; Center for Clinical and Translational Science, University of Kentucky, Lexington, Kentucky, USA.; Barnstable Brown Diabetes Center, University of Kentucky, Lexington, Kentucky, USA.
Jazyk: angličtina
Zdroj: Physiological reports [Physiol Rep] 2024 Feb; Vol. 12 (3), pp. e15924.
DOI: 10.14814/phy2.15924
Abstrakt: Circadian rhythms differ between young adult males and females. For example, males tend to be later chronotypes, preferring later timing of sleep and activity, than females. Likewise, there are sex differences in body composition and cardiorespiratory fitness. Few studies have investigated the association between circadian rhythms, cardiorespiratory fitness, and body composition. We sought to determine whether chronotype and circadian phase were associated with cardiorespiratory fitness, body composition, and anthropometric measures in sedentary males and females. Fifty-nine adults participated in the study. Circadian phase and chronotype were measured using dim light melatonin onset (DLMO) and the Morningness-Eveningness Questionnaire (MEQ) score. We used peak oxygen uptake (VO 2peak ) results from a maximal graded exercise test to assess cardiorespiratory fitness. Body composition, BMI, and circumferences were collected as markers of adiposity. We observed a sex difference in the association between DLMO and VO 2peak . For males, a later DLMO was associated with a lower VO 2peak . VO 2peak did not vary based on DLMO in females. Later circadian phase was also associated with increased body fat percentage, fat mass index, and abdominal circumference in males, but not females. Collectively, these results suggest that males who are later chronotypes may be at risk of obesity and low cardiorespiratory fitness.
(© 2024 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society.)
Databáze: MEDLINE
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