Document Detail


Nutrition and exercise determinants of postexercise glycogen synthesis.
MedLine Citation:
PMID:  1844567     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During the initial hours of recovery from prolonged exhaustive lower body exercise, muscle glycogen synthesis occurs at rates approximating 1-2 mmol.kg-1 wet wt.hr-1 if no carbohydrate is consumed. When carbohydrate is consumed during the recovery, the maximal rate of glycogen synthesis approximates 7-10 mmol.kg-1 wet wt.hr-1. The rate of post-exercise glycogen synthesis is lower if the magnitude of glycogen degradation is small, if less than 0.7 gm glucose.kg-1 body wt.hr-1 is ingested, when the recovery is active, and when the carbohydrate feeding is delayed. The rate of postexercise glycogen synthesis is not reduced during the initial hours (< 4) after eccentric exercise. For studies evaluating muscle glycogen synthesis in excess of 12 hours of recovery, average rates of glycogen synthesis are below 4 mmol.kg-1 wet wt.hr-1. Glycogen synthesis is known to be impaired for time periods in excess of 24 hours following exercise causing eccentric muscle damage. Following intense exercise resulting in high concentrations of muscle lactate, muscle glycogen synthesis occurs at between 15-25 mmol.kg-1 wet wt.hr-1. These synthesis rates occur without ingested carbohydrate during the recovery period and are maintained when a low intensity active recovery is performed.
Authors:
R A Robergs
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  International journal of sport nutrition     Volume:  1     ISSN:  1050-1606     ISO Abbreviation:  Int J Sport Nutr     Publication Date:  1991 Dec 
Date Detail:
Created Date:  1993-05-20     Completed Date:  1993-05-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9307702     Medline TA:  Int J Sport Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  307-37     Citation Subset:  IM; S    
Affiliation:
Department of Health Promotion, University of New Mexico, Albuquerque 87131.
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MeSH Terms
Descriptor/Qualifier:
Dietary Carbohydrates / administration & dosage
Exercise / physiology*
Glycogen / biosynthesis*,  metabolism
Humans
Kinetics
Lactates / metabolism
Lactic Acid
Muscles / metabolism*
Nutritional Physiological Phenomena*
Chemical
Reg. No./Substance:
0/Dietary Carbohydrates; 0/Lactates; 50-21-5/Lactic Acid; 9005-79-2/Glycogen

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


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