Milioni Fabio, Redkva Paulo E, Barbieri Fabio A, Zagatto Alessandro M
Department of Physical Education, São Paulo State University (Unesp), Bauru/SP, Brazil.
Nutr Health. 2017 Jun;23(2):111-118. doi: 10.1177/0260106017700436. Epub 2017 Mar 28.
Supplementation with β-alanine plays an important role as a precursor of carnosine, the most effective intramuscular buffer, and has been seen as a potential ergogenic aid, especially for high-intensity modalities such as basketball. Thus, the aim of the present study was to investigate the effects of 6 weeks of β-alanine supplementation on repeated sprint ability (RSA) and technical performances in young elite Brazilian basketball players. In total, 27 young basketball players (17±1 years) were randomized into a β-alanine group (Gβ - 6.4 g day of β-alanine) and a placebo group (GP - 6.4 g day of dextrose). Before and after the supplementation period the athletes performed a RSA test composed of ten 30 m sprints with two 180° changes of direction interspaced by 30 s of recovery. During the recovery period (i.e., after the sprints) the athletes performed a countermovement jump (CMJ) and a set of three free throws. After 48 h they performed a Yo-Yo intermittent recovery test level 1 (Yo-Yo IR1). Both groups increased the distance covered in the Yo-Yo IR1 after the supplementation period ( p = 0.001). On the other hand, both groups presented impairment in RSA time-performance (total time, best time, and mean time, p ≤ 0.04), while no significant changes were observed for technical task performances (i.e., CMJ and free throws) ( p ≥ 0.07). No between-group interactions were observed for any variable measured ( p ≥ 0.31). Thus, 6 weeks of β-alanine supplementation did not improve RSA or technical performances in young elite basketball players.
补充β-丙氨酸作为肌肽（最有效的肌肉内缓冲剂）的前体发挥着重要作用，并且已被视为一种潜在的提高运动能力的辅助手段，尤其是对于篮球等高强度运动项目。因此，本研究的目的是调查6周补充β-丙氨酸对巴西年轻精英篮球运动员反复冲刺能力（RSA）和技术表现的影响。总共27名年轻篮球运动员（17±1岁）被随机分为β-丙氨酸组（Gβ - 每天补充6.4克β-丙氨酸）和安慰剂组（GP - 每天补充6.4克葡萄糖）。在补充期前后，运动员进行了一次RSA测试，该测试由十次30米冲刺组成，每次冲刺之间有两次180°方向变化，每次变化之间有30秒的恢复时间。在恢复期间（即冲刺后），运动员进行了一次纵跳（CMJ）和一组三次罚球。48小时后，他们进行了一次Yo-Yo间歇恢复测试1级（Yo-Yo IR1）。补充期后，两组在Yo-Yo IR1中覆盖的距离均增加（p = 0.001）。另一方面，两组在RSA时间表现（总时间、最佳时间和平均时间，p≤0.04）上均出现下降，而技术任务表现（即CMJ和罚球）未观察到显著变化（p≥0.07）。对于所测量的任何变量，均未观察到组间相互作用（p≥0.31）。因此，6周补充β-丙氨酸并未改善年轻精英篮球运动员的RSA或技术表现。
