The percentage of type IIB fibers modifies creatine effects. Creatine supplementation and maintenance did not decrease ATP loss during intense sprint training. Sprint training decreased plasma levels of products of adenine nucleotide degradation and improved 30 sec sprint performance. Creatine supplementation and maintenance did not alter one-hour cycle distance. Creatine supplementation apparently has a differential effect depending upon the muscle characteristics of the individual.
Performance effects are limited to short-term anaerobic activities.
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