Document Detail


Branched-chain amino acid supplementation during repeated prolonged skiing exercises at altitude.
MedLine Citation:
PMID:  8876349     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study was conducted to test the hypothesis that a branched-chain amino acid (BCAA) supplementation would minimize changes in body composition and alterations in plasma amino acid profile induced by prolonged exercises at altitude. Twenty-four highly trained subjects participated in six successive sessions of ski mountaineering (6-8 hr duration, altitude 2,500-4,100 m). Twelve subjects took a dietary supplement of BCAA (BCAA group) and 12 took a dietary supplement that was 98% carbohydrate (C group). Body weight decreased in C subjects (-2.1%, p < .01), while the body weight loss recorded in the BCAA group was not statistically significant (-1.2%, NS). Changes in body composition that resulted from repeated skiing exercise at altitude were not significantly minimized by BCAA administration. Peak power output recorded during an incremental bicycle exercise decreased in C subjects but did not change significantly in BCAA subjects. Results of this study demonstrate that neither changes in body composition related to the ski mountaineering program nor muscular performance during isometric contraction was significantly affected by BCAA administration.
Authors:
A X Bigard; P Lavier; L Ullmann; H Legrand; P Douce; C Y Guezennec
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sport nutrition     Volume:  6     ISSN:  1050-1606     ISO Abbreviation:  Int J Sport Nutr     Publication Date:  1996 Sep 
Date Detail:
Created Date:  1997-01-09     Completed Date:  1997-01-09     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:  295-306     Citation Subset:  IM; S    
Affiliation:
Départment de Physiologie Systémique, CERMA, Brétigny-sur-Orge, France.
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MeSH Terms
Descriptor/Qualifier:
Adult
Altitude*
Amino Acids, Branched-Chain / administration & dosage*,  blood
Exercise / physiology
Glutamine / blood
Human Growth Hormone / blood
Humans
Hydrocortisone / blood
Insulin / blood
Male
Oxygen Consumption
Physical Endurance / physiology*
Skiing / physiology*
Tryptophan / blood
Chemical
Reg. No./Substance:
0/Amino Acids, Branched-Chain; 11061-68-0/Insulin; 12629-01-5/Human Growth Hormone; 50-23-7/Hydrocortisone; 56-85-9/Glutamine; 73-22-3/Tryptophan

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


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