Earnest, C. P., Beckham, S., & Whyte, B. O. (1998). Effect of acuate creatine ingestion on anaerobic performance. Medicine and Science in Sports and Exercise, 30(5), Supplement abstract 798.

Ss (M = 15; F = 9) ingested 4 x 5 gm/day of creatine for five days. Tests were performed before and after the loading. Ss were then assigned to one of three treatment groups: a) 10 gm of creatine, b) 80 gm of dextrose, or c) 10 gm of creatine and 80 gm of dextrose. Two Wingate 30-s tests separated by 5 minutes of recovery and blood measures for serum creatine 65 and 5 minutes before testing trials and plasma ammonia 5 minutes after trials were performed.

There were no significant differences for any variable between groups after short-term ingestion. There was an improvement in anaerobic performance and serum creatine after the five-day supplementation. Plasma ammonia was less after the testing trial after the period of supplementation.

Implication. Anaerobic performance increases as a result of five-days of creatine supplementation. Acute (one day) creatine supplementation does not effect anaerobic performance.

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