Aaserud R, Gramvik P, Olsen S R, Jensen J
Institute of Sport and Physical Education, Agder College, Kristiansand, Norway.
Scand J Med Sci Sports. 1998 Oct;8(5 Pt 1):247-51. doi: 10.1111/j.1600-0838.1998.tb00478.x.
In this study we have investigated the effect of creatine supplementation on performance of repeated sprint runs in well-trained young male handball players. The subjects participated in a test before supplementation (T1) and then received creatine (15 g/d) or placebo for five days before a second test was carried out (T2). Following T2, a low dose of creatine (2 g/d) or placebo was maintained for an additional nine days before the third test was performed (T3). The tests consisted of eight 40 m maximal sprint runs with a 25-s rest period between each sprint. Run time was reduced on the last three sprint runs after five days with high doses of creatine supplementation compared to T1 (P < 0.05). Although the run time during the last three sprints was still significantly lower after supplementation of low doses of creatine compared to T1, analysis of variance showed only a tendency for an interaction between test day and random group (P = 0.14). No improvement was seen in the placebo group. Blood lactate was similar at T1 and T2 in the creatine and placebo groups. In conclusion, high doses of creatine supplementation improve performance during repeated sprint runs in well-trained handball players. Further studies are needed to clarify whether low doses of creatine supplementation, after a period with supplementation of high doses, are able to maintain improved performance.
在本研究中，我们调查了补充肌酸对训练有素的年轻男性手球运动员重复冲刺跑表现的影响。受试者在补充前（T1）参加了一项测试，然后在进行第二次测试（T2）前五天接受肌酸（15克/天）或安慰剂。在T2之后，在进行第三次测试（T3）前额外九天维持低剂量肌酸（2克/天）或安慰剂。测试包括八次40米最大冲刺跑，每次冲刺之间有25秒的休息时间。与T1相比，在高剂量补充肌酸五天后的最后三次冲刺跑中，跑步时间缩短（P<0.05）。尽管与T1相比，补充低剂量肌酸后最后三次冲刺的跑步时间仍显著更低，但方差分析显示测试日与随机分组之间仅存在交互作用趋势（P = 0.14）。安慰剂组未见改善。肌酸组和安慰剂组在T1和T2时血乳酸水平相似。总之，高剂量补充肌酸可改善训练有素的手球运动员重复冲刺跑的表现。需要进一步研究以阐明在高剂量补充一段时间后，低剂量补充肌酸是否能够维持改善后的表现。
