PDF(Pubmed)
Abstract：
This study aimed to elucidate the impact of combining Beta-Alanine (BA) supplementation with short sprint interval training on cardiorespiratory fitness, anaerobic power, and bio-motor abilities in volleyball players. Twenty young male athletes were randomly divided into 2 equal groups and performed 8 weeks of short sprint interval training while supplementing 4.8 g daily BA or placebo (polydextrose). The players were evaluated for volleyball-specific bio-motor abilities (vertical jump, horizontal jump, spike jump, block jump, 10-m linear sprint, and T-test change of direction speed) and physiological parameters (cardiorespiratory fitness and anaerobic power) pre- and post-intervention. Both groups demonstrated significant (p ≤ 0.05) improvements in all measured variables over time. A time-regimen interaction was observed in jumping ability enhancement from pre- to post-training, wherein BA elicited more significant changes in both vertical and horizontal jumps compared to the placebo. Analyzing residuals in changes and the coefficient of variations (CV) in mean group changes demonstrated that BA supplementation results in uniformly inducing adaptive changes among individuals. Therefore, in light of these results, it is recommended that coaches and trainers take into consideration the utilization of BA as an ergogenic aid to enhance the vertical and horizontal jumps of volleyball players and increase the homogeneity in adaptive responses over the training period.
摘要：
本研究旨在阐明β-丙氨酸（BA）补充与短跑间隔训练相结合对心肺健康的影响，无氧电源，和排球运动员的生物运动能力。将20名年轻男性运动员随机分为2组，进行为期8周的短跑间隔训练，同时每天补充4.8gBA或安慰剂（聚葡萄糖）。对运动员进行了排球特有的生物运动能力评估(垂直跳跃，水平跳跃,尖峰跳跃,块跳跃,10米线性冲刺，以及方向速度的T检验变化）和干预前后的生理参数（心肺适应性和无氧功率）。两组均显示所有测量变量随时间的显着改善（p≤0.05）。从训练前到训练后，在跳跃能力增强方面观察到了时间-方案的相互作用，其中与安慰剂相比,BA在垂直和水平跳跃两者中引起更显著的变化。分析变化的残差和平均组变化的变异系数（CV）表明，补充BA会导致个体之间均匀地诱导适应性变化。因此,鉴于这些结果，建议教练和培训师考虑将BA用作人体工程学辅助手段，以增强排球运动员的垂直和水平跳跃，并在训练期间增加适应性反应的同质性。
