Author: Bougard Clement Bessot Nicolas Moussay Sebastien Sesboue Bruno Gauthier Antoine
Publisher: Informa Healthcare
ISSN: 0742-0528
Source: Chronobiology International, Vol.26, Iss.2, 2009-02, pp. : 307-323
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Diurnal variation in both core body temperature and indicators of physical performance are usually observed when measures are taken at 06:00 and 18:00 h. However, differences have been reported between findings in the literature; this may be in some part due to methodological reasons, such as if the experimenter allowed subjects to eat breakfast before the morning 06:00 h session, or even the waking time of subjects. Eleven diurnally active male subjects participated in four test sessions to examine if the time of morning wakening (04:00 or 05:00 h) and eating or not eating breakfast influence body temperature, flexibility, force production, and aerobic performance at 06:00 h. All four sessions were separated by ≥36 h and were completed in a counterbalanced order. Each test session comprised a sit-and-reach test, an arm maximal voluntary torque evaluation (isometric, concentric at 1.05 rad·s-1 and at 4.19 rad·s-1), and a 10 min all-out cycle ergometer test. Our results indicate the effects of waking time or food intake depend on the parameter tested. Consequently, we advise researchers to take care in experimental design and to at least standardize the time of awakening and consumption of breakfast.
Related content
By Bougard Clement Moussay Sebastien Gauthier Antoine Espie Stephane Davenne Damien
Chronobiology International, Vol. 26, Iss. 2, 2009-02 ,pp. :
By Schmidt Christina Peigneux Philippe Cajochen Christian Collette Fabienne
Chronobiology International, Vol. 29, Iss. 4, 2012-05 ,pp. :
By Gabel Virginie Maire Micheline Reichert Carolin F. Chellappa Sarah L. Schmidt Christina Hommes Vanja Viola Antoine U. Cajochen Christian
Chronobiology International, Vol. 30, Iss. 8, 2013-10 ,pp. :
By Darwent David Ferguson Sally A. Sargent Charli Paech Gemma M. Williams Louise Zhou Xuan Matthews Raymond W. Dawson Drew Kennaway David J. Roach Greg D.
Chronobiology International, Vol. 27, Iss. 5, 2010-06 ,pp. :