Burke L M, Pyne D B, Telford R D
Sports Science Sports Medicine, Australian Institute of Sport, Canberra, Australia.
Int J Sport Nutr. 1996 Sep;6(3):222-33. doi: 10.1123/ijsn.6.3.222.
Oral supplementation with creatine monohydrate (Cr.H2O) has been reported to increase muscle creatine phosphate levels. The aim of the present study was to determine the effect of such supplementation on performance of a single-effort sprint by elite swimmers. Thirty-two elite swimmers (M = 18, F = 14; age = 17-25 years) from the Australian Institute of Sport were tested on two occasions, 1 week apart. Tests performed were 25-m, 50-m, and 100-m maximal effort sprints (electronically timed with dive start, swimmers performing their best stroke), each with approximately 10 min active recovery. A 10-s maximal leg ergometry test was also undertaken. Swimmers were divided into two groups matched for sex, stroke/event, and sprint time over 50 m, and groups were randomly assigned to 5 days of Cr.H2O supplementation (4 . day-1 x 5 g Cr.H2O + 2 g sucrose, n = 16) or placebo (4 . day-1 x 5 g Polycose + 2 g sucrose, n = 16) prior to the second trial. Results revealed no significant differences between the group means for sprint times or between 10-s maximal leg ergometry power and work. This study does not support the hypothesis that creatine supplementation enhances single-effort sprint ability of elite swimmers.
据报道，口服补充一水肌酸（Cr.H2O）可提高肌肉磷酸肌酸水平。本研究的目的是确定这种补充剂对精英游泳运动员单次全力冲刺表现的影响。来自澳大利亚体育学院的32名精英游泳运动员（男性18名，女性14名；年龄17 - 25岁）接受了两次测试，间隔1周。测试项目包括25米、50米和100米全力冲刺（从跳水出发开始电子计时，游泳运动员采用其最佳泳姿），每次冲刺后有大约10分钟的主动恢复时间。还进行了一次10秒的最大腿部测力计测试。游泳运动员按性别、泳姿/项目以及50米冲刺时间进行匹配，分为两组，在第二次测试前，一组随机分配接受5天的Cr.H2O补充（每天4次，每次5克Cr.H2O + 2克蔗糖，n = 16），另一组接受安慰剂（每天4次，每次5克聚葡萄糖 + 2克蔗糖，n = 16）。结果显示，两组的冲刺时间均值之间以及10秒最大腿部测力计功率和做功之间均无显著差异。本研究不支持补充肌酸可增强精英游泳运动员单次全力冲刺能力这一假设。
