Document Detail


The effects of carbohydrate loading on muscle glycogen content and cycling performance.
MedLine Citation:
PMID:  7749423     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study compared the effects of supplementing the normal diets of 8 endurance-trained cyclists with additional carbohydrate (CHO), in the form of potato starch, for 3 days on muscle glycogen utilization and performance during a 3-hr cycle ride. On two occasions prior to the trial, the subjects ingested in random order either their normal CHO intake of 6.15 +/- 0.23 g/kg body mass/day or a high-CHO diet of 10.52 +/- 0.57 g/kg body mass/day. The trial consisted of 2 hr of cycling at approximately 75% of VO2peak with five 60-s sprints at 100% VO2peak at 20-min intervals, followed by a 60-min performance ride. Increasing CHO intake by 72 +/- 9% for 3 days prior to the trial elevated preexercise muscle glycogen contents, improved power output, and extended the distance covered in 1 hr. Muscle glycogen contents were similar at the end of the 3-hr trial, indicating a greater utilization of glycogen when subjects were CHO loaded, which may have been responsible for their improved cycling performance.
Authors:
L H Rauch; I Rodger; G R Wilson; J D Belonje; S C Dennis; T D Noakes; J A Hawley
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sport nutrition     Volume:  5     ISSN:  1050-1606     ISO Abbreviation:  Int J Sport Nutr     Publication Date:  1995 Mar 
Date Detail:
Created Date:  1995-06-20     Completed Date:  1995-06-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9307702     Medline TA:  Int J Sport Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  25-36     Citation Subset:  IM    
Affiliation:
Bioenergetics of Exercise Research Unit, Medical Research Council, Observatory, South Africa.
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MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling*
Blood Glucose / metabolism
Dietary Carbohydrates / administration & dosage,  pharmacology*
Glycogen / metabolism*
Humans
Lactates / blood
Male
Muscle, Skeletal / drug effects,  metabolism*
Solanum tuberosum
Starch / administration & dosage,  pharmacology
Chemical
Reg. No./Substance:
0/Blood Glucose; 0/Dietary Carbohydrates; 0/Lactates; 9005-25-8/Starch; 9005-79-2/Glycogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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