中等強度運動前增補支鏈胺基酸對肌肉損傷指標的影響

The Effects of Branched-Chain Amino Acid Supplementation before Moderate Exercise on Indices of Muscle Damage

10.6127/JEPF.2010.11.06

陳香吟(Shing-Ying Chen)；林正常(Jung-Charng Lin)

固定式腳踏車 ； 肌酸激酶 ； 乳酸脫氫酶 ； cycle ergometer ； creatine kinase ； lactate dehydrogenase

運動生理暨體能學報

11輯（2010 / 12 / 31）

57 - 67

繁體中文

Purpose: The purpose of this study was to examine the effect of branched-chain amino acid (BCAA) supplementation on indices of muscle damage. Methods: Eight healthy active college students participated in a double-blinded crossover study. The subjects ingested either 92 mg/kg BW of BCAA (BCAA) or placebo (PLA) capsules 60 min before exercise respectively. They exercised at 60% VO(subscript 2max) on cycle ergometer for 30 minutes. Blood samples were collected prior to supplementation, immediately prior to exercise, and 0, 15, 60 min after cycling (P0, P15, P60) for analysis of creatine kinase (CK) and lactate dehydrogenase (LDH). The data were analyzed by two-way repeated measures ANOVA and significance was accepted at α=.05. Results: No interactions between treatment and timing were found. Significant main effect was found for treatment and timing on CK and for the main effect of treatment, BCAA's response of CK were significantly lower than PLA (BCAA: 167.30±90.55 U/L; PLA: 200.17±117.46 U/L, p＜.05). Significant main effect was found for timing on LDH. Conclusions: These results indicate that supplementary BCAA 60 min before cycling decreased serum concentrations of the intramuscular enzymes CK after moderate cycling exercise. The effects of BCAA supplementation are suggested to reduce the risk of muscle damage.

Purpose: The purpose of this study was to examine the effect of branched-chain amino acid (BCAA) supplementation on indices of muscle damage. Methods: Eight healthy active college students participated in a double-blinded crossover study. The subjects ingested either 92 mg/kg BW of BCAA (BCAA) or placebo (PLA) capsules 60 min before exercise respectively. They exercised at 60% VO(subscript 2max) on cycle ergometer for 30 minutes. Blood samples were collected prior to supplementation, immediately prior to exercise, and 0, 15, 60 min after cycling (P0, P15, P60) for analysis of creatine kinase (CK) and lactate dehydrogenase (LDH). The data were analyzed by two-way repeated measures ANOVA and significance was accepted at α=.05. Results: No interactions between treatment and timing were found. Significant main effect was found for treatment and timing on CK and for the main effect of treatment, BCAA's response of CK were significantly lower than PLA (BCAA: 167.30±90.55 U/L; PLA: 200.17±117.46 U/L, p＜.05). Significant main effect was found for timing on LDH. Conclusions: These results indicate that supplementary BCAA 60 min before cycling decreased serum concentrations of the intramuscular enzymes CK after moderate cycling exercise. The effects of BCAA supplementation are suggested to reduce the risk of muscle damage.