Ishizaki, S. (1999). The effect of oral creatine supplementation on power output during long-term intermittent exercise in men. Medicine and Science in Sports and Exercise, 31(5), Supplement abstract 1282.

Football players (N = 12) were divided into creatine and placebo supplementation groups. Supplements were 4 x 5 g/day for five days. After the supplementation, long-term intermittent exercise was performed (30 x 5-second maximal load cycling interspersed with 90 seconds of easy riding).

Mean power output, and blood lactate concentration, increased only in the creatine group. Blood ammonia concentration decreased in the creatine group.

Implication. Creatine supplementation increases power output in long-term intermittent exercise. It would be useful for athletes in games such as American football.

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