Douroudos Ioannis I, Fatouros Ioannis G, Gourgoulis Vassilios, Jamurtas Athanasios Z, Tsitsios Tilemaxos, Hatzinikolaou Athanasios, Margonis Konstantinos, Mavromatidis Kontantinos, Taxildaris Kiriakos
Democritus University of Thrace, Department of Physical Education & Sport Science, Komotini, Greece.
Med Sci Sports Exerc. 2006 Oct;38(10):1746-53. doi: 10.1249/01.mss.0000230210.60957.67.
Sodium bicarbonate (NaHCO3) ingestion may prevent exercise-induced perturbations in acid-base balance, thus resulting in performance enhancement. This study aimed to determine whether different levels of NaHCO3 intake influences acid-base balance and performance during high-intensity exercise after 5 d of supplementation.
Twenty-four men (22 +/- 1.7 yr) were randomly assigned to one of three groups (eight subjects per group): control (C, placebo), moderate NaHCO3 intake (MI, 0.3 g x kg(-1) x d(-1)), and high NaHCO3 intake (HI, 0.5 g x kg(-1) x d(-1)). Arterial pH, HCO3(-), PO2, PCO2, K+, Na, base excess (BE), lactate, and mean power (MP) were measured before and after a Wingate test pre- and postsupplementation.
HCO3(-) increased proportionately to the dosage level. No differences were detected in C. Supplementation increased MP (W x kg(-)) in MI (7.36 +/- 0.7 vs 6.73 +/- 1.0) and HI (7.72 +/- 0.9 vs 6.69 +/- 0.6), with HI being more effective than MI. NaHCO3 ingestion resulted postexercise in increased lactate (mmol x L(-1)) (12.3 +/- 1.8 vs 10.3 +/- 1.9 and 12.4 +/- 1.2 vs 10.4 +/- 1.5 in MI and HI, respectively), reduced exercise-induced drop of pH (7.305 +/- 0.04 vs 7.198 +/- 0.02 and 7.343 +/- 0.05 vs 7.2 +/- 0.01 in MI and HI, respectively) and HCO3(-) (mmol x L(-1)) (13.1 +/- 2.4 vs 17.5 +/- 2.8 and 13.2 +/- 2.7 vs 19.8 +/- 3.2 for HCO3 in MI and HI, respectively), and reduced K (3.875 +/- 0.2 vs 3.625 +/- 0.3 mmol x L(-1) in MI and HI, respectively).
NaHCO3 administration for 5 d may prevent acid-base balance disturbances and improve performance during anaerobic exercise in a dose-dependent manner.
摄入碳酸氢钠（NaHCO₃）可能预防运动引起的酸碱平衡紊乱，从而提高运动表现。本研究旨在确定补充5天后，不同水平的NaHCO₃摄入量是否会影响高强度运动期间的酸碱平衡和运动表现。
24名男性（22±1.7岁）被随机分为三组之一（每组8名受试者）：对照组（C，安慰剂）、中等NaHCO₃摄入量组（MI，0.3 g·kg⁻¹·d⁻¹）和高NaHCO₃摄入量组（HI，0.5 g·kg⁻¹·d⁻¹）。在补充前后进行温盖特测试前后，测量动脉pH值、HCO₃⁻、PO₂、PCO₂、K⁺、Na、碱剩余（BE）、乳酸和平均功率（MP）。
HCO₃⁻与剂量水平成比例增加。对照组未检测到差异。补充后，MI组（7.36±0.7对6.73±1.0）和HI组（7.72±0.9对6.69±0.6）的MP（W·kg⁻¹）增加，HI组比MI组更有效。摄入NaHCO₃后运动后乳酸（mmol·L⁻¹）增加（MI组和HI组分别为12.3±1.8对10.3±1.9和12.4±1.2对10.4±1.5），运动引起的pH值下降减少（MI组和HI组分别为7.305±0.04对7.198±0.02和7.
