Juhász, I., Györe, I., Csende, Z., Rácz, L., & Tihanyi, J. (2009). Creatine supplementation improves the anaerobic performance of elite junior fin swimmers. ACTA Physiologica Hungarica, 96, 325-336.

This study ascertained whether creatine supplementation could improve mechanical power output and swimming performance in highly trained junior male competitive fin swimmers (N = 16). Ss were randomly and evenly assigned to either a creatine (4 x 5 g/day creatine monohydrate for five days) or placebo group (same dose of a dextrose-ascorbic acid placebo). Before and after supplementation, the average power output was determined by a Bosco-test and swimming time was measured in two maximal 100 m fin swims.

After five days of creatine supplementation, the average power of one minute continuous rebound jumps increased by 20.2%. Lactate concentration was significantly less after five minutes restitution at the second measurement in both groups. Swimming time was significantly reduced in both first and second sessions of swimming in the creatine supplementation group, but remained almost unchanged in the placebo group.

Implication. Five days of creatine supplementation enhances dynamic strength, improves performance in consecutive maximal swims, and may increase anaerobic metabolism in the lower extremity muscles in highly trained adolescent fin swimmers.

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