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

卷:40

Pinheiro Brisola, Gabriel Motta ; Miyagi, Willian Eiji ; da Silva, Henrique Santos ; Zagatto, Alessandro Moura

关键词: anaerobic capacity;    blood lactate;    ergogenic aid;    sodium bicarbonate;    supramaximal efforts;   

DOI  :  10.1139/apnm-2015-0036

学科分类：食品科学和技术

【 摘 要 】

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.