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EXERCISE X BCAA SUPPLEMENTATION IN YOUNG TRAINED RATS: WHAT ARE THEIR EFFECTS ON BODY GROWTH?

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Author(s): Patricia Lopes de Campos-Ferraz | Sandra Maria Lima Ribeiro | Silmara dos Santos Luz | Antonio Herbert Lancha Jr. | Julio Tirapegui

Journal: Journal of Sports Science and Medicine
ISSN 1303-2968

Volume: 10;
Issue: 3;
Start page: 483;
Date: 2011;
Original page

Keywords: Branched-chain amino acids | exercise | growth | metabolism | leucine | rat

ABSTRACT
The purpose of this study was to evaluate whether Branched-chain amino acids (BCAAs) supplementation had any beneficial effects on growth and metabolic parameters of young rats submitted to chronic aerobic exercise. Thirty-two young rats (age: 21-d) were randomly assigned to four experimental groups (n = 8): Supplemented Trained (Sup/Ex), Control Trained (Ctrl/Ex), Supplemented Sedentary (Sup/Sed) and Control Sedentary (Ctrl/Sed). The trained groups underwent a five-week swimming protocol and received supplemented (45 mg BCAA/body weight/day) or control ration. Trained animals presented a lower body length and a higher cartilage weight, regardless of supplementation. Physical activity was responsible for a substantial reduction in proteoglycan synthesis in cartilage tissue, and BCAA supplementation was able to attenuate this reduction and also to improve glycogen stores in the liver, although no major differences were found in body growth associated to this supplementation

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