PMID: 9167889May 1, 1997Paper

Circadian rhythm in the torque developed by elbow flexors during isometric contraction. Effect of sampling schedules

Chronobiology International
A GauthierJ Van Hoecke

Abstract

Time-dependent changes in elbow flexion torque have been documented according to two different sampling schedules. Seven physical education students took part in the first series of experiments, and 7 other similar subjects in the second. In both sets of experiments, the subjects performed isometric contractions: maximal and submaximal at 90 degrees in the first experiments and maximal at different angular positions in the second. After a 30-minute rest period, the torque developed was measured at 00:00, 06:00, 09:00, 12:00, 15:00, 18:00, and 21:00 h on the day of the experiment. These subjects remained in the laboratory for 24 h. In the second series of experiments, the torque developed was measured at 01:00, 05:00, 09:00, 13:00, 17:00, and 21:00 h over the subsequent 6 days with only one test session per day. In this case, there was an interval of 20 h between two successive test sessions. In the first experiment, a significant time-of-day effect was observed for the torque of the elbow flexors under isometric conditions with an acrophase at 17:58 h. The 24 h normalized mean score was 92.85% with an amplitude of 7.63% of the daily mean. In the second series of experiments, there was evidence of a circadian rhythm in the torqu...Continue Reading

References

Sep 1, 1983·American Industrial Hygiene Association Journal·A FreivaldsG D Langolf
Jan 1, 1994·Ergonomics·A ColdwellsT Reilly
Aug 1, 1993·Chronobiology International·W J RietveldJ M Waterhouse
Jul 1, 1996·Chronobiology International·A GauthierJ Van Hoecke

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Citations

Dec 29, 2010·Experimental Brain Research·Clement BougardDamien Davenne
Dec 8, 2009·Journal of Strength and Conditioning Research·Stephen BloncOlivier Hue
Apr 26, 2012·Journal of Strength and Conditioning Research·Hamdi Chtourou, Nizar Souissi
Sep 11, 2014·Neural Regeneration Research·Yong Hyun Kwon, Ki Seok Nam
Jun 10, 2000·Acta Physiologica Scandinavica·J P FollandD A Jones
Aug 5, 2006·Chronobiology International·N BessotD Davenne
Jun 22, 2010·Chronobiology International·Lawrence D HayesJulien S Baker
Sep 18, 2014·Chronobiology International·Nicolas BessotSebastien Moussay
Feb 13, 2009·Chronobiology International·Clement BougardAntoine Gauthier
Aug 19, 2016·Chronobiology International·A ZouabiA Gauthier
Mar 9, 2013·Chest·Joost A C GazendamRichard J Schwab
Nov 30, 2018·Journal of Applied Physiology·James L NuzzoSimon C Gandevia
Jan 19, 2019·Nature Reviews. Endocrinology·Brendan M Gabriel, Juleen R Zierath
Feb 5, 2005·Medicine and Science in Sports and Exercise·Sébastien RacinaisOlivier Hue
Sep 6, 2017·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Hamdi Jaafar, Hanene Lajili
Oct 16, 2015·Journal of Strength and Conditioning Research·Disa L HatfieldWilliam J Kraemer
Sep 4, 2019·Chronobiology International·Raphael KnaierRalf Roth
Jul 16, 2020·Chronobiology International·N BessotA Gauthier
Aug 31, 2004·Chronobiology International·S RacinaisS Blonc
May 4, 2005·Chronobiology International·B DrustT Reilly
Oct 11, 2003·Chronobiology International·S MoussayD Davenne
Jan 4, 2003·Chronobiology International·S MoussayD Davenne
Dec 16, 2020·Chronobiology International·Tristan MartinGaëlle Quarck
Dec 17, 2020·Physiology·Collin M DouglasKaryn A Esser

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