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Effect of beta-alanine, with and without sodium bicarbonate, on 2000-m rowing performance

Hobson, Ruth M ; Harris, Roger C ; Martin, Dan ; Smith, Perry ; Macklin, Ben ; Gualano, Bruno ; Sale, Craig

International journal of sport nutrition and exercise metabolism, 2013-10, Vol.23 (5), p.480-487 [Periódico revisado por pares]

United States

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  • Título:
    Effect of beta-alanine, with and without sodium bicarbonate, on 2000-m rowing performance
  • Autor: Hobson, Ruth M ; Harris, Roger C ; Martin, Dan ; Smith, Perry ; Macklin, Ben ; Gualano, Bruno ; Sale, Craig
  • Assuntos: Adult ; beta-Alanine - pharmacology ; Bicarbonates - blood ; Cross-Over Studies ; Dietary Supplements ; Double-Blind Method ; Exercise Test ; Humans ; Hydrogen-Ion Concentration ; Lactic Acid - blood ; Physical Endurance - drug effects ; Sodium Bicarbonate - pharmacology ; Sports - physiology ; Young Adult
  • É parte de: International journal of sport nutrition and exercise metabolism, 2013-10, Vol.23 (5), p.480-487
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-News-1
    ObjectType-Feature-3
    content type line 23
  • Descrição: To examine the effect of beta-alanine only and beta-alanine with sodium bicarbonate supplementation on 2,000-m rowing performance. Twenty well-trained rowers (age 23 ± 4 y; height 1.85 ± 0.08 m; body mass 82.5 ± 8.9 kg) were assigned to either a placebo or beta-alanine (6.4 g · d(-1) for 4 weeks) group. A 2,000-m rowing time trial (TT) was performed before supplementation (Baseline) and after 28 and 30 days of supplementation. The post supplementation trials involved supplementation with either maltodextrin or sodium bicarbonate in a double-blind, crossover design, creating four study conditions (placebo with maltodextrin; placebo with sodium bicarbonate; beta-alanine with maltodextrin; beta-alanine with sodium bicarbonate). Blood lactate, pH, bicarbonate, and base excess were measured pre-TT, immediately post-TT and at TT+5 min. Performance data were analyzed using magnitude based inferences. Beta-alanine supplementation was very likely to be beneficial to 2,000-m rowing performance (6.4 ± 8.1 s effect compared with placebo), with the effect of sodium bicarbonate having a likely benefit (3.2 ± 8.8 s). There was a small (1.1 ± 5.6 s) but possibly beneficial additional effect when combining chronic beta-alanine supplementation with acute sodium bicarbonate supplementation compared with chronic beta-alanine supplementation alone. Sodium bicarbonate ingestion led to increases in plasma pH, base excess, bicarbonate, and lactate concentrations. Both chronic beta-alanine and acute sodium bicarbonate supplementation alone had positive effects on 2,000-m rowing performance. The addition of acute sodium bicarbonate to chronic beta-alanine supplementation may further enhance rowing performance.
  • Editor: United States
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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