The effect of longer-term creatine supplementation on elite swimming performance after an acute creatine loading
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CONTRIBUTORS:
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JOURNAL:
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YEAR:
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1999
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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CREATINE; DIETARY-SUPPLEMENTATION; SWIMMING; ELITE-ATHLETE; ADOLESCENT; YOUNG-ADULT
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DISCIPLINE:
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No discipline assigned
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HTTP:
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LANGUAGE:
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English
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PUB ID:
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103-366-697
(Last edited on
2002/02/27 18:44:58 US/Mountain)
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SPONSOR(S):
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ABSTRACT:
We investigated the effect of an acute creatine loading (25 g per day for 4 days) and longer-term creatine supplementation (5 g of creatine or 5 g of placebo per day for 2 months) on the performance of 22 elite swimmers during maximal interval sessions. After the acute creatine loading, the mean of the average interval swim times for all swimmers (n=22) improved (44.3 plus or minus 16.5 s before vs 43.7 plus or minus 16.3 s after supplementation; P<0.01). Three of the 22 swimmers did not respond positively to supplementation. After 2 months of longer-term creatine supplementation or placebo, neither group showed a significant change in swimming performance (38.7 plus or minus 13.5 s before vs 38.7 plus or minus 14.1 s after for the creatine group; 48.7 plus or minus 18.0 s before vs 48.7 plus or minus 18.1 s after for the placebo group). We conclude that, in elite swimmers, 4 days of acute creatine loading improves swimming performance significantly when assessed by maximal interval sessions. However, longer-term supplementation for 2 months (5 g of creatine per day) did not benefit significantly the creatine group compared with the placebo group.
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