title: Sodium bicarbonate supplementation improved MAOD but is not correlated with 200- and 400-m running performances: a double-blind, crossover, and placebo-controlled study.
abstract: 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 (MAODALT) 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 MAODALT (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 MAODALT and 200- and 400-m running performance tests. Therefore, we can conclude that both MAODALT and the anaerobic lactic metabolism are modified after acute NaHCO3 ingestion, but it is not correlated with running performance.
authors: a Post-Graduate Program in Motricity Sciences, Univ Estadual Paulista - UNESP, Rio Claro - SP, Brazil.|b Laboratory of Physiology and Sport Performance (LAFIDE), Univ Estadual Paulista - UNESP, Bauru - SP, Brazil.
authors: Gabriel Motta Pinheiro
authors: GM
authors: Brisola
authors: a Post-Graduate Program in Motricity Sciences, Univ Estadual Paulista - UNESP, Rio Claro - SP, Brazil.|b Laboratory of Physiology and Sport Performance (LAFIDE), Univ Estadual Paulista - UNESP, Bauru - SP, Brazil.
authors: Willian Eiji
authors: WE
authors: Miyagi
authors: a Post-Graduate Program in Motricity Sciences, Univ Estadual Paulista - UNESP, Rio Claro - SP, Brazil.
authors: Henrique Santos
authors: HS
authors: da Silva
authors: b Laboratory of Physiology and Sport Performance (LAFIDE), Univ Estadual Paulista - UNESP, Bauru - SP, Brazil.|c Department of Physical Education, Univ Estadual Paulista - UNESP, Bauru-SP, Brazil.
authors: Alessandro Moura
authors: AM
authors: Zagatto
mesh_terms: D000328:Adult; D015308:Anaerobic Threshold; D001938:Brazil; D018592:Cross-Over Studies; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006801:Humans; D019344:Lactic Acid / Q000378:metabolism; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects*; D018482:Muscle, Skeletal / Q000187:drug effects* / Q000502:physiology; D010101:Oxygen Consumption / Q000187:drug effects*; D010807:Physical Endurance / Q000187:drug effects; D012420:Running; D017693:Sodium Bicarbonate / Q000008:administration & dosage*; D013997:Time Factors; D055815:Young Adult
chemical_list: D019344:Lactic Acid; D017693:Sodium Bicarbonate
keywords: anaerobic capacity; bicarbonate de sodium; blood lactate; capacité anaérobie; efforts supramaximaux; ergogenic aid; facteur ergogène; lactate sanguin; sodium bicarbonate; supramaximal efforts