Combined Creatine and Sodium Bicarbonate Supplementation Enhances Interval Swimming

• Autores: Antti A. Mero, Kari L. Keskinen, Marko T. Malvela, Janne M. Sallinen
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 18, Nº. 2, 2004, págs. 306-310
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • This study examined the effect of simultaneous supplementation of creatine and sodium bicarbonate on consecutive maximal swims. Sixteen competitive male and female swimmers completed, in a randomized order, 2 different treatments (placebo and a combination of creatine and sodium bicarbonate) with 30 days of washout period between treatments in a double-blind crossover procedure. Both treatments consisted of placebo or creatine supplementation (20 g per day) in 6 days.

    In the morning of the seventh day, there was placebo or sodium bicarbonate supplementation (0.3 g per kg body weight) during 2 hours before a warm-up for 2 maximal 100-m freestyle swims that were performed with a passive recovery of 10 minutes in between. The first swims were similar, but the increase in time of the second versus the first 100-m swimming time was 0.9 seconds less (p , 0.05) in the combination group than in placebo.

    Mean blood pH was higher (p , 0.01�0.001) in the combination group than in placebo after supplementation on the test day.

    Mean blood pH decreased (p , 0.05) similarly during the swims in both groups. Mean blood lactate increased (p , 0.001) during the swims, but there were no differences in peak blood lactate between the combination group (14.9 6 0.9 mmol·L21) and placebo (13.4 6 1.0 mmol·L21). The data indicate that simultaneous supplementation of creatine and sodium bicarbonate enhances performance in consecutive maximal swims.