Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/372
Type: Artigo de periódico
Title: Branched-chain amino acids supplementation enhances exercise capacity and lipid oxidation during endurance exercise after muscle glycogen depletion
Author: GUALANO, A. B.
BOZZA, T.
CAMPOS, P. Lopes De
ROSCHEL, H.
COSTA, A. Dos Santos
MARQUEZI, M. Luiz
BENATTI, F.
LANCHA JUNIOR, A. Herbert
Abstract: Aim. It has been demonstrated that branched-chain amino acids (BCAA) transaminase activation occurs simultaneously with exercise-induced muscle glycogen reduction, suggesting that BCAA supplementation might play an energetic role in this condition. This study aimed to test whether BCAA supplementation enhances exercise capacity and lipid oxidation in glycogen-depleted subjects. Methods. Using a double-blind cross-over design, volunteers (N.=7) were randomly assigned to either the BCAA (300 mg . kg . day (-1)) or the placebo (maltodextrine) for 3 days. On the second day, subjects were submitted to an exercise-induced glycogen depletion protocol. They then performed an exhaustive exercise test on the third day, after which time to exhaustion, respiratory exchange ratio (RER), plasma glucose, free fatty acids (HA), blood ketones and lactate were determined. BCAA supplementation promoted a greater resistance to fatigue when compared to the placebo (+17.2%). Moreover, subjects supplemented with BCAA showed reduced RER and higher plasma glucose levels during the exhaustive exercise test. Results. No significant differences appeared in FFA, blood ketones and lactate concentrations. Conclusion. In conclusion, BCAA supplementation increases resistance to fatigue and enhances lipid oxidation during exercise in glycogen-depleted subjects.
Subject: Amino acids, branched-chain
Exercise
Glycogen
Citric acid cycle
Country: Itália
Editor: EDIZIONI MINERVA MEDICA
Citation: JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS, v.51, n.1, p.82-88, 2011
Rights: fechado
Address: http://apps.isiknowledge.com/InboundService.do?Func=Frame&product=WOS&action=retrieve&SrcApp=EndNote&UT=000289590400011&Init=Yes&SrcAuth=ResearchSoft&mode=FullRecord
http://apps.isiknowledge.com/InboundService.do?Func=Frame&product=WOS&action=retrieve&SrcApp=EndNote&UT=000289590400011&Init=Yes&SrcAuth=ResearchSoft&mode=FullRecord
Date Issue: 2011
Appears in Collections:IB - Artigos e Materiais de Revistas Científicas

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