Glaister Mark, Lockey Richard A, Abraham Corinne S, Staerck Allan, Goodwin Jon E, McInnes Gillian
School of Human Sciences, St Mary's College, University of Surrey, Strawberry Hill, Twickenham, UK.
J Strength Cond Res. 2006 May;20(2):273-7. doi: 10.1519/R-17184.1.
The aim of this study was to examine the effects of short-term creatine monohydrate supplementation on multiple sprint running performance. Using a double-blind research design, 42 physically active men completed a series of 3 indoor multiple sprint running trials (15 x 30 m repeated at 35-second intervals). After the first 2 trials (familiarization and baseline), subjects were matched for fatigue score before being randomly assigned to 5 days of either creatine (4 x d(-1) x 5 g creatine monohydrate + 1 g maltodextrin) or placebo (4 x d(-1) x 6 g maltodextrin) supplementation. Sprint times were recorded via twin-beam photocells, and earlobe blood samples were drawn to evaluate posttest lactate concentrations. Relative to placebo, creatine supplementation resulted in a 0.7 kg increase in body mass (95% likely range: 0.02 to 1.3 kg) and a 0.4% reduction in body fat (95% likely range: -0.2 to 0.9%). There were no significant (p > 0.05) between-group differences in multiple sprint measures of fastest time, mean time, fatigue, or posttest blood lactate concentration. Despite widespread use as an ergogenic aid in sport, the results of this study suggest that creatine monohydrate supplementation conveys no benefit to multiple sprint running performance.
本研究的目的是检验短期补充一水肌酸对多次冲刺跑成绩的影响。采用双盲研究设计，42名身体活跃的男性完成了一系列3次室内多次冲刺跑试验（15次30米跑，间隔35秒重复进行）。在前两次试验（熟悉和基线）后，根据疲劳评分将受试者匹配，然后随机分配至补充肌酸（4×d⁻¹×5克一水肌酸+1克麦芽糊精）或安慰剂（4×d⁻¹×6克麦芽糊精）5天的组中。通过双光束光电管记录冲刺时间，并采集耳垂血样以评估测试后乳酸浓度。与安慰剂相比，补充肌酸导致体重增加0.7千克（95%可能范围：0.02至1.3千克），体脂减少0.4%（95%可能范围：-0.2至0.9%）。在最快时间、平均时间、疲劳或测试后血乳酸浓度的多次冲刺测量中，组间无显著差异（p>0.05）。尽管一水肌酸在运动中作为一种提高运动能力的辅助剂被广泛使用，但本研究结果表明，补充一水肌酸对多次冲刺跑成绩并无益处。
