Delecluse Christophe, Diels Rudi, Goris Marina
Exercise Science and Biomechanics Laboratory, Faculty of Physical Education and Physiotherapy, Department of Kinesiology, Katholieke Universiteit Leuven, 3001 Leuven, Belgium.
J Strength Cond Res. 2003 Aug;17(3):446-54. doi: 10.1519/1533-4287(2003)017<0446:eocsoi>2.0.co;2.
This study examined the impact of short-term (7-day), high-dose (0.35 g.kg(-1).d(-1)) oral creatine monohydrate supplementation (CrS) on single sprint running performance (40 m, <6 seconds) and on intermittent sprint performance in highly trained sprinters. Nine subjects completed the double-blind cross-over design with 2 supplementation periods (placebo and creatine) and a 7-week wash-out period. A test protocol consisting of 40-m sprint runs was performed, and running velocity was continuously recorded over the total distance. The maximal sprint performance, the relative degree of fatigue at the end of intermittent sprint exercise (6 x 40 m, 30-second rest interval), as well as the degree of recovery (120-second passive rest) remained unchanged following CrS. There were no significant changes related to CrS in absolute running velocity at any distance between start and finish (40 m). It was concluded that no ergogenic effect on single or repeated 40-m sprint times with varying rest periods was observed in highly trained athletes.
本研究探讨了短期（7天）、高剂量（0.35克·千克⁻¹·天⁻¹）口服一水肌酸补充剂（CrS）对高水平短跑运动员单次短跑成绩（40米，<6秒）和间歇短跑成绩的影响。9名受试者完成了双盲交叉设计，包括2个补充期（安慰剂和肌酸）以及1个7周的洗脱期。执行了由40米短跑组成的测试方案，并在整个距离上持续记录跑步速度。在补充CrS后，最大短跑成绩、间歇短跑运动结束时的相对疲劳程度（6×40米，30秒休息间隔）以及恢复程度（120秒被动休息）均保持不变。在起点和终点之间的任何距离（40米）上，与CrS相关的绝对跑步速度均无显著变化。得出的结论是，在高水平运动员中，未观察到CrS对单次或重复的40米短跑成绩（不同休息时间）有促力效应。
