Does sodium-bicarbonate ingestion improve simulated judo performance?

Int J Sport Nutr Exerc Metab. 2007 Apr;17(2):206-17. doi: 10.1123/ijsnem.17.2.206.


The aim of the present study was to investigate whether preexercise sodium-bicarbonate ingestion improves judo-related performance. The study used 2 different protocols to evaluate performance: 3 bouts of a specific judo test (n = 9) and 4 bouts of the Wingate test for upper limbs (n = 14). In both protocols athletes ingested 0.3 g/kg of sodium bicarbonate or placebo 2 h before the tests. Blood samples were collected to determine lactate level, and levels of perceived exertion were measured throughout the trials. The study used a double-blind, counterbalanced, crossover design. Ingestion of sodium bicarbonate improved performance in Bouts 2 and 3 of Protocol 1 (P < 0.05), mean power in Bouts 3 and 4 of Protocol 2 (P < 0.05), and peak power in Bout 4 of Protocol 2 (P < 0.05). Ingestion of bicarbonate increased lactate concentration in Protocol 1 (P < 0.05) but not in Protocol 2. Ratings of perceived exertion did not differ between treatments. In conclusion, sodium bicarbonate improves judo-related performance and increases blood lactate concentration but has no effect on perceived exertion.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acid-Base Equilibrium / drug effects*
  • Adult
  • Alkalosis / prevention & control
  • Cross-Over Studies
  • Double-Blind Method
  • Humans
  • Lactates / blood*
  • Martial Arts / physiology*
  • Sodium Bicarbonate / administration & dosage*
  • Time Factors


  • Lactates
  • Sodium Bicarbonate