Sodium bicarbonate supplementation improved MAOD but is not correlated with 200-and 400-m running performances: a double-blind, crossover, and placebo-controlled study

Autor(es)

Pinheiro Brisola, Gabriel Motta ^{[1, 2]} ; Miyagi, Willian Eiji ^{[1, 2]} ; da Silva, Henrique Santos ^[1] ; Zagatto, Alessandro Moura ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, UNESP, Postgrad Program Motricity Sci, Rio Claro, SP - Brazil

^[2] Univ Estadual Paulista, UNESP, Lab Physiol & Sport Performance LAFIDE, Bauru, SP - Brazil

^[3] Univ Estadual Paulista, UNESP, Dept Phys Educ, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED PHYSIOLOGY NUTRITION AND METABOLISM; v. 40, n. 9, p. 931-937, SEP 2015.
• Citações Web of Science: 16

Resumo

The aim of the study was to investigate the effects of acute supplementation of sodium bicarbonate (NaHCO3) on maximal accumulated oxygen deficit (MAOD) determined by a single supramaximal effort (MAOD(ALT)) in running and the correlation with 200- and 400-m running performances. Fifteen healthy men (age, 23 +/- 4 years; maximal oxygen uptake, 50.6 +/- 6.1 mL.kg(-1).min(-1)) underwent a maximal incremental exercise test and 2 supramaximal efforts at 110% of the intensity associated with maximal oxygen uptake, which was carried out after ingesting either 0.3 g.kg(-1) body weight NaHCO3 or a placebo (dextrose) and completing 200- and 400-m performance tests. The study design was double-blind, crossover, and placebo-controlled. Significant differences were found between the NaHCO3 and placebo conditions for MAOD(ALT) (p = 0.01) and the qualitative inference for substantial changes showed a very likely positive effect (98%). The lactic anaerobic contribution in the NaHCO3 ingestion condition was significantly higher (p < 0.01) and showed a very likely positive effect (99% chance), similar to that verified for peak blood lactate concentration (p < 0.01). No difference was found for time until exhaustion (p = 0.19) or alactic anaerobic contribution (p = 0.81). No significant correlations were observed between MAOD(ALT) and 200- and 400-m running performance tests. Therefore, we can conclude that both MAOD(ALT) and the anaerobic lactic metabolism are modified after acute NaHCO3 ingestion, but it is not correlated with running performance. (AU)

• Processo FAPESP: 14/02829-5 - Determinação do máximo déficit acumulado de oxigênio utilizando apenas uma sessão de exercício supramáximo em cicloergômetro
• Beneficiário: Willian Eiji Miyagi
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/12940-8 - Determinação do déficit máximo de oxigênio acumulado por meio de uma única sessão de esforço supramáximo: análise da reprodutibilidade, influência do ergômetro e intensidade de esforço
• Beneficiário: Alessandro Moura Zagatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular