McNaughton, Lars, Dalton, Brad and Palmer, Gerry (1999) Sodium bicarbonate can be used as an ergogenic aid in high-intensity, competitive cycle ergometry of 1 h duration. European Journal of Applied Physiology and Occupational Physiology, 80(1), pp. 64-69. ISSN (print) 0301-5548Full text not available from this archive.
The aim of this study was to determine whether a dose of 300-mg x kg(-1) body mass of sodium bicarbonate would effect a high-intensity, 1-h maximal cycle ergometer effort. Ten male, well-trained [maximum oxygen consumption 67.3 (3.3) ml x kg(-1) x min(-1), mean (SD)] volunteer cyclists acted as subjects. Each undertook either a control (C), placebo (P), or experimental (E) ride in a random, double-blind fashion on a modified, air-braked cycle ergometer, attached to a personal computer to which the work and power data was downloaded at 10 Hz. Fingertip blood was sampled at 10-min intervals throughout the exercise. Blood was also sampled at 1, 3, 5, and 10 min post-exercise. Blood was analysed for lactate, partial pressure of Carbon dioxide and oxygen, pH and plasma bicarbonate (HCO-) concentration. Randomly chosen pairs of subjects were asked to complete as much work as possible during the 60-min exercise periods in an openly competitive situation. The sodium bicarbonate had the desired effect of increasing blood HCO3- prior to the start of the test. The subjects in E completed 950.9 (81.1) kJ of work, which was significantly more (F(2,27) = 5.28, P < 0.01) than during either the C [835.5 (100.2) kJ] or P [839.0 (88.6) kJ] trials. No differences were seen in peak power or in the power:mass ratio between these three groups. The results of this study suggest that sodium bicarbonate may be used to offset the fatigue process during high-intensity, aerobic cycling lasting 60 min.
|Uncontrolled Keywords:||endurance activity, blood gas, ph bicarbonate, acid-base-balance, induced metabolic alkalosis, anaerobic threshold, maximal exercise, racing time, ph, performance, ingestion, lactate, muscle|
|Research Area:||Sports-related studies
|Faculty, School or Research Centre:||Faculty of Science (until 2011)|
|Depositing User:||Automatic Import Agent|
|Date Deposited:||08 Feb 2011 11:13|
|Last Modified:||08 Feb 2011 11:16|
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