PMID: 3745057Aug 1, 1986Paper

Effects of 24-hour fast on cycling endurance time at two different intensities

Journal of Applied Physiology
S F LoyA G Fisher

Abstract

Ten competitive cyclists were exercised to exhaustion to test the potential of a 24-h fast for increasing endurance. One group (n = 4) was tested at an initial intensity of 86% maximum O2 uptake (VO2max) (HI) and a second group (n = 6) at 79% VO2max (MI). Both groups repeated test rides in fasted and normal-diet conditions. Time to fatigue was designated at two points: fatigue 1 occurred when pedal frequency could not be maintained at the initial percent VO2max; fatigue 2 occurred when pedal frequency could not be maintained at a workload of approximately 65% VO2max. In both HI and MI the 24-h fast had no effect on resting muscle glycogen stores but significantly increased plasma free fatty acid (FFA) levels. Despite the increased FFA availability, time to fatigue was reduced in the fasted groups. Fatigue 1 and 2 times (mean +/- SE) for HI-fasted were 42.0 +/- 6.2 and 170.0 +/- 20.4 min, respectively, compared with those of the HI-normal diet of 115.3 +/- 25.6 and 201.0 +/- 14.8 min. Fatigue 1 and 2 times for MI-fasted were 142.0 +/- 19.6 and 167.5 +/- 10.5 min compared with those of the MI-normal diet of 191.3 +/- 25.0 and 214.3 +/- 18.9 min. The cause of fatigue at fatigue 1 was not readily apparent. Fatigue 2 in all groups s...Continue Reading

Citations

Jan 1, 1988·European Journal of Applied Physiology and Occupational Physiology·M GleesonR J Maughan
Feb 7, 2003·Journal of Applied Physiology·Philip N AinslieThomas Reilly
Dec 24, 2009·International Journal of Sports Physiology and Performance·Anis ChaouachiKarim Chamari
May 20, 1998·Medicine and Science in Sports and Exercise·G OkanoY Murata
Apr 6, 2005·International Journal of Obesity : Journal of the International Association for the Study of Obesity·P SchrauwenK Cianflone
Nov 17, 2009·Journal of Strength and Conditioning Research·Anis ChaouachiMohamed Amri
Jan 1, 1988·European Journal of Applied Physiology and Occupational Physiology·R J Maughan, M Gleeson
Mar 27, 2004·Scandinavian Journal of Medicine & Science in Sports·Kai Henrik Wiborg Lange
Jul 1, 1988·The American Review of Respiratory Disease·M D Altose
Feb 28, 2004·Sports Medicine·Nathan A JohnsonMartin W Thompson
Feb 7, 2009·Journal of Strength and Conditioning Research·Lisa M FergusonWayne C Miller
Sep 8, 2015·European Journal of Applied Physiology·Lewis J JamesSusan M Shirreffs
Nov 23, 2006·European Journal of Applied Physiology·David A ArnallPeggy Fortune
Jun 25, 2016·International Journal of Obesity : Journal of the International Association for the Study of Obesity·D J ClaytonL J James
Aug 7, 1998·European Journal of Clinical Investigation·A A TanisG R Swart
Nov 16, 1987·Clinica Chimica Acta; International Journal of Clinical Chemistry·M Gleeson

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