PDF(Pubmed)
Abstract：
The aim of the current study was to investigate the effects of ingesting different dosages of caffeine (CAF) prior to plyometric jump training (PJT) on sport-related performance and physiological parameters in male basketball players. Twenty-four young athletes were randomly divided into 3 groups and performed 6 weeks of PJT while consuming 3 mg·kg-1 of body mass caffeine (CAF3, n = 8), 6 mg·kg-1 body mass caffeine (CAF6, n = 8) or placebo (PL; n = 8) one hour prior to each training session. Before and after the 6-week PJT, the players were evaluated for field-based basketball-specific performance measures (vertical jump, 20-m sprint, Illinois change of direction speed [CODS], and maximal strength) and lab-based physiological (aerobic capacity and anaerobic power) parameters. CAF3, CAF6, and PL groups demonstrated significant improvements in vertical jump (ES = 1.07, 1.45, and 1.1, respectively), 20-m sprint (ES = - 0.50, - 0.61, and - 0.36), change of direction performance (ES = - 1.22, - 1.26, and - 1.09), maximal strength (ES = 1.68, 2.29, and 1.17), maximum oxygen uptake (V̇O2max) (ES = 1.09, 1.59, and 0.92), and peak (ES = 1.82, 1.85, and 0.82) and average power output (ES = 1.39, 1.32, and 1.07) after 6 weeks of training. Comparative analysis of individual adaptive responses to training indicated that the CAF6 led to insignificantly greater effects in vertical jump (ES = 1.45), maximal strength (ES = 2.29), and V̇O2max (ES = 1.59) with lower residuals in individual changes and lower coefficient of variations (CV) in mean group changes. Regarding sprint and CODS performance, both experimental groups indicated similar changes, residuals in individual changes, and CVs in mean group changes. Overall, consuming 6 mg·kg-1 body mass caffeine induces superior adaptations in aerobic fitness, anaerobic power, and sport-specific performance measures, with lower inter-individual variability in the adaptations and more homogenized changes over the training period.
摘要：
本研究的目的是研究在进行多跳训练（PJT）之前摄入不同剂量的咖啡因（CAF）对男子篮球运动员与运动相关的表现和生理参数的影响。将24名年轻运动员随机分为3组，在摄入3mg·kg-1体重咖啡因（CAF3，n=8）的同时进行6周的PJT，每次训练前一小时，体重为6mg·kg-1的咖啡因（CAF6，n=8）或安慰剂（PL；n=8）。在6周PJT之前和之后，对球员进行了基于场地的篮球特定表现测量(垂直跳跃，20米冲刺,伊利诺伊州方向改变速度[CODS]，和最大强度）和基于实验室的生理（有氧能力和无氧能力）参数。CAF3、CAF6和PL组显示垂直跳跃显著改善(ES分别为1.07、1.45和1.1)，20米冲刺(ES=-0.50、-0.61和-0.36)，方向性能变化(ES=-1.22、-1.26和-1.09)，最大强度(ES=1.68、2.29和1.17)，最大摄氧量（V²O2max）（ES=1.09，1.59和0.92），训练6周后的峰值（ES=1.82、1.85和0.82）和平均功率输出（ES=1.39、1.32和1.07）。对训练的个体适应性反应的比较分析表明，CAF6导致垂直跳跃的影响不明显更大（ES=1.45），最大强度（ES=2.29），和VO2max（ES=1.59），个体变化的残差较低，平均组变化的变异系数（CV）较低。关于sprint和CODS性能，两个实验组都表现出相似的变化，个别变化中的残差，和平均组变化中的CV。总的来说,摄入6mg·kg-1体重的咖啡因会诱导有氧健身的良好适应性，无氧电源，以及针对特定运动的绩效指标，在训练期间，适应的个体间变异性较低，变化更均匀。
