短期支鏈胺基酸增補對運動誘發之肌肉損傷及肌力與衝刺表現之影響

Effects of Short-term Branched-Chain Amino Acid Supplementation on Exercise-Induced Muscle Damage, Muscle Strength, and Sprint Performance

10.6646/CYPEJ.202407_(22).0005

詹紫涵(Tzu-Han Chan)

高強度間歇運動 ； 肌肥大 ； 恢復 ； 運動員 ； 增補劑 ； HIIT ； Hypertrophy ； Recovery ； Athlete ； Ergogenic Aid

中原體育學報

22期（2024 / 07 / 01）

44 - 54

繁體中文;英文

研究目的：本研究旨在探討運動前預先增補支鏈胺基酸（branched-chain amino acids, BCAA）對高強度反覆衝刺所導致之運動後肌肉損傷（exercised-induced muscle damage, EIMD）以及運動表現之影響。方法：10名健康規律運動男性（年齡：23.2 ± 1.5歲）參加隨機、雙盲、安慰劑處理實驗，在運動前三天以及當日運動前分別增補9.6g／天BCAA或安慰劑（placebo, PLA）膠囊。增補完成後進行15組30m反覆衝刺誘發EIMD。於增補前（pre）、運動後24小時（24 h）及48小時（48 h）測量延遲性肌肉痠痛（delay onset muscle soreness, DOMS）、肌酸激酶（creatine kinase, CK）、最大等長肌力（maximal voluntary isometric contraction, MVIC）以及30m衝刺時間，所得數據以混和設計二因子變異數分析（two-way ANOVA, mixed-design）進行檢定，以LSD法進行事後比較，p=.05為顯著水準。結果：所有依變相於實驗處理與時間之交互作用均未達顯著，實驗主要效果未達顯著，而時間主要效果皆達顯著差異，事後分析DOMS以及CK在24h及48h顯著高於pre。MVIC在24h及48h顯著低於pre，30m衝刺時間僅有24h顯著高於pre。結論：運動前三天以及運動前預先增補BCAA（9.6g／天）無法顯著降低反覆衝刺引起EIMD之肌肉損傷指標以及運動表現流失。

Purpose: This study investigates the effects of pre-exercise branched-chain amino acid (BCAA) supplementation on exercise-induced muscle damage (EIMD) and performance following high-intensity repeated sprints. Methods: Ten healthy, regularly exercising men (age: 23.2 ± 1.5 years) participated in a randomized, double-blind, placebo-controlled trial. Participants were supplemented with either 9.6g/day of BCAA or a placebo (PLA) capsule for three days prior to and on the day before exercise. Following supplementation, participants performed 15 sets of 30m repeated sprints to induce EIMD. Delayed onset muscle soreness (DOMS), creatine kinase (CK), maximal voluntary isometric contraction (MVIC), and 30m sprint time were measured at pre-supplementation (pre), 24 hours post-exercise (24 h), and 48 hours post-exercise (48 h). Data were analyzed using a mixed-design two-way ANOVA and post hoc comparisons were conducted using the LSD method with a significance level of p = .05. Results: There were no significant interaction effects between experimental conditions and time for any dependent variables. Main effects of the experimental condition were not significant, while the main effects of time showed significant differences. Post hoc analysis revealed that DOMS and CK were significantly higher at 24 h and 48 h compared to pre, MVIC was significantly lower at 24 h and 48 h compared to pre, and 30m sprint time was significantly higher at 24 h compared to pre. Conclusion: Pre-exercise supplementation with BCAA (9.6g/day) for three days and prior to exercise did not significantly reduce muscle damage markers or performance loss induced by repeated sprints.