PDF(Pubmed)
Abstract：
BACKGROUND: The increasing prevalence of high-intensity sports activities, notably the burgeoning popularity of CrossFit, underscores the contemporary significance of such physical pursuits. The discernible protective impact of branched-chain amino acids on muscle fatigue and injuries is emerging as a noteworthy area of investigation. Within the realm of sports, integrating BCAA supplementation into dietary practices holds promise for aiding athletes in their recovery, particularly in mitigating Delayed-Onset Muscle Soreness.
METHODS: This study adopted an experimental pilot design with repeated measures, employing a controlled and randomized approach through double-blind procedures. The participant engaged in high-intensity activity, specifically the CrossFit Karen® test, which entailed executing 150 wall ball throws (9 kg) to a height of 3 m. The trial incorporated three randomized supplementation conditions: BCAAs in an 8:1:1 ratio or a 2:1:1 ratio or a placebo condition. The participant consumed 15 g daily for 7 days, commencing 72 h prior to the initial blood sample and the first Karen® test.
RESULTS: In this study, BCAA supplementation at an 8:1:1 ratio demonstrated a discernible protective effect against muscular damage, as evidenced by creatine kinase values and ratings of perceived exertion.
METHODS: This study adopted an experimental pilot design with repeated measures, employing a controlled and randomized approach through double-blind procedures. The participant engaged in high-intensity activity, specifically the CrossFit Karen® test, which entailed executing 150 wall ball throws (9 kg) to a height of 3 m. The trial incorporated three randomized supplementation conditions: BCAAs in an 8:1:1 ratio or a 2:1:1 ratio or a placebo condition. The participant consumed 15 g daily for 7 days, commencing 72 h prior to the initial blood sample and the first Karen® test.
RESULTS: In this study, BCAA supplementation at an 8:1:1 ratio demonstrated a discernible protective effect against muscular damage, as evidenced by creatine kinase values and ratings of perceived exertion.
摘要：
背景：高强度体育活动的患病率越来越高，特别是CrossFit的迅速普及，强调了这种身体追求的当代意义。支链氨基酸对肌肉疲劳和损伤的明显保护性影响正在成为一个值得注意的研究领域。在体育领域，将BCAA补充剂整合到饮食实践中，有望帮助运动员康复，特别是在减轻延迟发作的肌肉酸痛。
方法：本研究采用重复措施的实验中试设计，通过双盲程序采用对照随机方法。参与高强度活动的参与者，特别是CrossFitKaren®测试，这需要执行150个壁球投掷（9公斤）到3m的高度。该试验纳入了三种随机补充条件：8：1：1比例或2：1：1比例的BCAA或安慰剂条件。参与者每天消耗15克，持续7天，在初始血液样本和第一次Karen®测试之前72小时开始。
结果：在这项研究中，以8：1：1的比例补充BCAA显示出对肌肉损伤的明显保护作用，肌酸激酶值和感知劳累的等级证明了这一点。
方法：本研究采用重复措施的实验中试设计，通过双盲程序采用对照随机方法。参与高强度活动的参与者，特别是CrossFitKaren®测试，这需要执行150个壁球投掷（9公斤）到3m的高度。该试验纳入了三种随机补充条件：8：1：1比例或2：1：1比例的BCAA或安慰剂条件。参与者每天消耗15克，持续7天，在初始血液样本和第一次Karen®测试之前72小时开始。
结果：在这项研究中，以8：1：1的比例补充BCAA显示出对肌肉损伤的明显保护作用，肌酸激酶值和感知劳累的等级证明了这一点。
