Branched Chain Amino Acids (BCAA) supplementation and its effect on the protein muscle balance and the central fatigue on endurance exercises
Abstract
The objective of this study was review the effects of BCAA for muscle protein balance and central fatigue in exercise of long duration. It was analyzed 17 international scientific articles and 2 national scientific articles published between 1996 and 2008. In 7 studies were used rats as experimental model and 12 the human model. Among the studies analyzed that used rats, all 7 events had positive effects. Of these, 6 were made with the consumption of leucine alone. Among the studies discussed with people, there were 5 events of positive effects and 7 events with non result. Among the studies with positive effect, most showed improvement related to synthesis protein or proteolysis inhibition on individuals. In most of these studies, the leucine was responsable for these results alone. The theory that BCAA would reduce the central fatigue has much support as rejection in the studies. The vast discrepancy between the experimental protocols used difficulted the analysis of the results. Before this, it was concluded that there is still no sufficient scientific evidence proving categorically the beneficial effect of BCAA intake on the income of physical exercise in endurance.
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