Effects of creatine supplementation on repetitive sprint performance and body composition in competitive swimmers.
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In a double-blind and randomized manner, 18 male and female junior competitive swimmers supplemented their diets with 21 g.day-1 of creatine monohydrate (Cr) or a maltodextrin placebo (P) for 9 days during training. Prior to and following supplementation, subjects performed three 100-m freestyle sprint swims (long course) with 60 s rest/recovery between heats. In addition, subjects performed three 20-s arm ergometer maximal-effort sprint tests in the prone position with 60 s rest/recovery between sprint tests. Significant differences were observed among swim times, with Cr subjects swimming significantly faster than P subjects following supplementation in Heat 1 and significantly decreasing swim time in the second 100-m sprint. There was also some evidence that cumulative time to perform the three 100-m swims was decreased in the Cr group. Results indicate that 9 days of Cr supplementation during swim training may provide some ergogenic value to competitive junior swimmers during repetitive sprint performance.
author list (cited authors)
Grindstaff, P. D., Kreider, R., Bishop, R., Wilson, M., Wood, L., Alexander, C., & Almada, A.
complete list of authors
Grindstaff, PD||Kreider, R||Bishop, R||Wilson, M||Wood, L||Alexander, C||Almada, A