High-Velocity Intermittent Running: Effects of Beta-alanine Supplementation.

• Autores: Abbie E. Smith, David H. Fukuda, Jeffrey R. Stout, Kristina L. Kendall
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 26, Nº. 10, 2012, págs. 2798-2805
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Dialnet Métricas: 4 Citas
• Resumen

  • The use of [beta]-alanine in sport is widespread. However, the effects across all sport activities are inconclusive. The purpose of this study was to evaluate the effects of [beta]-alanine supplementation on high-intensity running performance and critical velocity (CV) and anaerobic running capacity (ARC). Fifty recreationally trained men were randomly assigned, in a double-blind fashion, to a [beta]-alanine group (BA, 2 × 800 mg tablets, 3 times daily; CarnoSyn; n = 26) or placebo group (PL, 2 × 800 mg maltodextrin tablets, 3 times daily; n = 24). A graded exercise test (GXT) was performed to establish peak velocity (PV). Three high-speed runs to exhaustion were performed at 110, 100, and 90% of PV, with 15 minutes of rest between bouts. The distances achieved were plotted over the time to exhaustion (TTE). Linear regression was used to determine the slope (CV) and y-intercept (ARC) of these relationships to assess aerobic and anaerobic performances, respectively. There were no significant treatment effects (p > 0.05) on CV or ARC for either men or women. Additionally, no TTE effects were evident for bouts at 90�110%PV lasting 1.95�5.06 minutes. There seems to be no ergogenic effect of [beta]-alanine supplementation on CV, ARC, or high-intensity running lasting approximately 2�5 minutes in either men or women in the current study.