長距離ランナーにおけるLTレベルの長時間運動パフォーマンスに対する分岐鎖アミノ酸摂取の影響

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The purpose of this study was to investigate effect of branched-chain amino acids (BCAA) ingestion on energy metabolism and endurance cycling performance of exhaustive prolonged exercise. The exhaustive prolonged exercise was performed for 60 min. at lactate threshold and was performed on exhaustive continuously at onset of blood lactate accumulation. In this experiment which was double-blinded, cross-over and placebo-controlled, nine male distance runners were administered orally on two separate occasions both BCAA ingestion and isocaloric placebo. Oxygen consumption (V0_2) and carbon dioxide production (VCO_2) was measured during exhaustive prolonged exercise. Blood samples were drawn at rest, during prolonged exercise and at exhaustion from ante-cubital vein. Blood BCAA concentration was significantly higher in the BCAA ingestion group than in the placebo group. However, there were no differences between the two treatment groups in blood glucose, blood insulin, blood free fatty acid and respiratory exchange ratio during exhaustive prolonged exercise. Although it was significantly the low value of the ratio of tryptophan to BCAA in BCAA ingestion group, there was no difference between the two treatment groups in endurance cycling performance. These results suggest that the effects of BCAA ingestion was not clear in this experiment because of endurance cycling performance is influences by the ranking order effect after the trial of exhaustive prolonged exercise.
久留米大学の論文

長距離ランナーにおけるLTレベルの長時間運動パフォーマンスに対する分岐鎖アミノ酸摂取の影響

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