Effects of 4 Weeks of beta-Alanine Supplementation on Swim-Performance Parameters in Water Polo Players

Autor(es)

Pinheiro Brisola, Gabriel Motta ^[1] ; Milioni, Fabio ^[1] ; Papoti, Marcelo ^[2] ; Zagatto, Alessandro Moura ^[3]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Postgrad Program Movement Sci, Rio Claro - Brazil

^[2] Univ Sao Paulo, Sch Phys Educ & Sport Ribeirao Preto, Sao Paulo - Brazil

^[3] Sao Paulo State Univ UNESP, Lab Physiol & Sport Performance, Rio Claro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE; v. 12, n. 7, p. 943-950, AUG 2017.
• Citações Web of Science: 2

Resumo

In water polo, several high-intensity efforts are performed, leading to the fatigue process due to accumulation of hydrogen ions, and thus beta-alanine supplementation could be an efficient strategy to increase the intramuscular acid buffer. Purpose: To investigate whether 4 wk of beta-alanine supplementation enhances parameters related to water polo performance. Methods: Twenty-two highly trained male water polo players of national level were randomly assigned to receive 28 d of either beta-alanine or a placebo (4.8 g/d of the supplement in the first 10 d and 6.4 g/d in the final 18 d). The participants performed 30-s maximal tethered swimming (30TS), 200-m swimming (P200m), and 30-s crossbar jumps (30CJ) before and after the supplementation period. Results: The beta-alanine group presented significant increases in 30TS for mean force (P=.04; Delta=30.5% +/- 40.4%) and integral of force (P=.05; Delta=28.0% +/- 38.0%), as well as P200m (P=.05; Delta=-2.2% +/- 2.6%), while the placebo group did not significantly differ for mean force (P=.13; Delta=24.1% +/- 33.7%), integral of force (P=.12; Delta=24.3% +/- 35.1%), or P200m (P=.10; Delta=-1.6% +/- 3.8%). However, there was no significant group effect for any variable, and the magnitude-based-inference analysis showed unclear outcomes between groups (Cohen d +/- 95% CL mean force = 0.16 +/- 0.83, integral of force = 0.12 +/- 0.84, and P200m = 0.05 +/- 0.30). For 30CJ the results were similar, with improvements in both groups (placebo,. = 14.9% +/- 14.1%; beta-alanine, Delta = 16.9% +/- 18.5%) but with no significant interaction effect between groups and an unclear effect (0.14 +/- 0.75). Conclusion: Four weeks of beta-alanine supplementation does not substantially improve performance of 30TS, P200m, or 30CJ in highly trained water polo athletes compared with a control group. (AU)

• Processo FAPESP: 14/02186-7 - Efeito da suplementação beta-alanina sobre a capacidade e potência anaeróbia, habilidade de esforços repetidos e desempenho no polo aquático
• Beneficiário: Gabriel Motta Pinheiro Brisola
• Modalidade de apoio: Bolsas no Brasil - Mestrado