Journal of Nutritional Science and Vitaminology
Online ISSN : 1881-7742
Print ISSN : 0301-4800
ISSN-L : 0301-4800
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Effects of Squat Exercise and Branched-Chain Amino Acid Supplementation on Plasma Free Amino Acid Concentrations in Young Women
Yoshiharu SHIMOMURAHisamine KOBAYASHIKazunori MAWATARIKeiichi AKITAAsami INAGUMASatoko WATANABEGustavo BAJOTTOJuichi SATO
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2009 Volume 55 Issue 3 Pages 288-291

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Abstract

The present study was conducted to examine alterations in plasma free amino acid concentrations induced by squat exercise and branched-chain amino acid (BCAA) supplementation in young, untrained female subjects. In the morning on the exercise session day, participants ingested drinks containing either BCAA (isoleucine : leucine : valine=1 : 2.3 : 1.2) or dextrin (placebo) at 0.1 g/kg body weight 15 min before a squat exercise session, which consisted of 7 sets of 20 squats, with 3 min intervals between sets. In the placebo trial, plasma BCAA concentrations were decreased subsequent to exercise, whereas they were significantly increased in the BCAA trial until 2 h after exercise. Marked changes in other free amino acids in response to squat exercise and BCAA supplementation were observed. In particular, plasma concentrations of methionine and aromatic amino acids were temporarily decreased in the BCAA trial, being significantly lower than those in the placebo trial. These results suggest that BCAA intake before exercise affects methionine and aromatic amino acid metabolism.

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© 2009 by the Center for Academic Publications Japan
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