Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations.
Four groups of male subjects participated in anaerobic testing on a Repco EX10 cycle ergometer to determine the effectiveness of sodium bicarbonate (0.3 g kg-1 body mass) as an ergogenic aid during exercise of 10, 30, 120 and 240 s duration. Blood was collected 90 min prior to ingestion of sodium bicarbonate (NaHCO3), after ingestion of NaHCO3 and immediately post-exercise from a heated (43-46 degrees C) fingertip and analysed immediately post-collection for pH, base excess, bicarbonate and lactate. The total work undertaken (kJ) and peak power achieved during the tests were also obtained via a Repco Work Monitor Unit. Blood bicarbonate levels were again increased above the control and placebo conditions (P < 0.001) and blood lactate levels were also increased following the bicarbonate trials. The pH levels fell significantly (P < 0.05) below the control and placebo conditions in all trials. The results indicate that NaHCO3 at this dosage has no ergogenic benefit for work of either 10 or 30 s duration, even though blood bicarbonate levels were significantly increased (P < 0.05) following ingestion of NaHCO3. For work periods of 120 and 240 s, performance was significantly increased (P < 0.05) above the control and placebo conditions following NaHCO3 ingestion.
McNaughton
L R
LR
Centre for Physical Education, University of Tasmania, Australia.
D000328:Adult; D000471:Alkalosis / Q000139:chemically induced / Q000378:metabolism; D015308:Anaerobic Threshold / Q000502:physiology*; D001639:Bicarbonates / Q000008:administration & dosage* / Q000097:blood / Q000494:pharmacology; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000097:blood; D019344:Lactic Acid; D008297:Male; D010807:Physical Endurance / Q000502:physiology; D012964:Sodium / Q000008:administration & dosage* / Q000097:blood / Q000494:pharmacology; D017693:Sodium Bicarbonate
D001639:Bicarbonates; D007773:Lactates; D019344:Lactic Acid; D017693:Sodium Bicarbonate; D012964:Sodium