PMID: 9189727Jan 1, 1997Paper

Effects of 3 days of carbohydrate supplementation on muscle glycogen content and utilisation during a 1-h cycling performance

European Journal of Applied Physiology and Occupational Physiology
John A HawleyT D Noakes

Abstract

This study compared the effects of supplementing the normal diets of six trained cyclists [maximal oxygen uptake (VO2max) 4.5 (0.36) l.min-1; values are mean (SD)] with additional carbohydrate (CHO) on muscle glycogen utilisation during a 1-h cycle time-trial (TT). Using a randomised crossover design, subjects consumed either their normal diet (NORM) for 3 days, which consisted of 426 (137) g.day-1 CHO [5.9 (1.4) g. kg-1 body mass (BM)], or additional CHO (SUPP) to increase their intake to 661 (76) g.day-1 [9.3 (0.7) g. kg-1 BM]. The SUPP diet elevated muscle glycogen content from 459 (83) to 565 (62) mmol.kg-1 dry weight (d.w.) (P < 0.05). However, despite the increased pre-exercise muscle glycogen stores, there was no difference in the distance cycled during the TT [40.41 (1.44) vs 40.18 (1.76) km for NORM and SUPP, respectively]. With NORM, muscle glycogen declined from 459 (83) to 175 (64) mmol.kg-1 d.w., whereas with SUPP the corresponding values were 565 (62) and 292 (113) mmol.kg-1 d.w. Accordingly, both muscle glycogen utilisation [277 (64) vs 273 (114) mmol.kg-1 d.w.] and total CHO oxidation [169 (20) vs 165 (30) g.h-1 for NORM and SUPP, respectively] were similar. Neither were there any differences in plasma glucose o...Continue Reading

Citations

Nov 17, 2010·European Journal of Applied Physiology·D R PendergastN M Fisher
May 10, 2013·Sports Medicine·Carlos Rafaell Correia-OliveiraAdriano Eduardo Lima-Silva
Feb 15, 2001·The British Journal of Nutrition·J A HawleyM A Febbraio
May 8, 1998·The Proceedings of the Nutrition Society·C Williams
Feb 20, 2004·Journal of Sports Sciences·Mark HargreavesAsker Jeukendrup
Jul 11, 2006·British Journal of Sports Medicine·C M ShingJ S Coombes
Feb 27, 2013·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Stephen C LaneJohn A Hawley
Aug 29, 2013·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Jacques DécombazVirgile Lecoultre
Feb 28, 2004·Sports Medicine·Nathan A JohnsonMartin W Thompson
Sep 27, 2005·Sports Medicine·Chris R Abbiss, Paul B Laursen
Feb 25, 2009·The Journal of Physiology·E S ChambersD A Jones
Jul 20, 1999·Clinics in Sports Medicine·J L Ivy
Aug 5, 2000·Molecular Genetics and Metabolism·L Poenaru
Sep 14, 2004·Journal of Applied Physiology·Anne K HansenBente Klarlund Pedersen
Nov 12, 2009·Sports Medicine·Cecilia M ShingLesley M Stevenson
Mar 31, 2010·Medicine and Science in Sports and Exercise·Carl J HulstonAsker E Jeukendrup
Dec 3, 2009·Medicine and Science in Sports and Exercise·Ian RolloClyde Williams
May 29, 2010·Medicine and Science in Sports and Exercise·Megan L R RossLouise M Burke
Jul 9, 2008·Current Sports Medicine Reports·Darlene A Sedlock
Mar 4, 2015·Journal of Strength and Conditioning Research·Theocharis IspoglouLauren C Duckworth
Feb 6, 2020·International Journal of Sport Nutrition and Exercise Metabolism·Sally P WaterworthJames P Morton
Jun 19, 2001·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·A St Clair GibsonT D Noakes
Jun 6, 2002·Medicine and Science in Sports and Exercise·Timothy J FairchildPaul A Fournier
Mar 11, 2003·Journal of Applied Physiology·N A JohnsonM W Thompson
Oct 20, 2000·Medicine and Science in Sports and Exercise·J BalmerS R Bird
May 28, 2011·Sports Medicine·Ian Rollo, Clyde Williams
Aug 8, 2012·International Journal of Sports Physiology and Performance·Stephen A InghamVictoria L Richmond
Apr 24, 2017·Sports Medicine·Freddy BrownJessica Hill
Nov 18, 2000·Medicine and Science in Sports and Exercise·C R BruceJ A Hawley
Aug 19, 2000·Medicine and Science in Sports and Exercise·J BalmerS R Bird
Jul 3, 2007·Journal of Applied Biomechanics·William BertucciAlain Groslambert
Feb 26, 2008·Neurologic Clinics·Michaela C Devries, Mark A Tarnopolsky
Dec 17, 2008·Physical Medicine and Rehabilitation Clinics of North America·Michaela C Devries, Mark A Tarnopolsky

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