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Sodium bicarbonate ingestion does not alter the slow component of oxygen uptake kinetics in professional cyclists


Reference:

Santalla, A., Perez, M., Montilla, M., Vicente, L., Davison, R., Earnest, C. P. and Lucia, A., 2003. Sodium bicarbonate ingestion does not alter the slow component of oxygen uptake kinetics in professional cyclists. Journal of Sports Sciences, 21 (1), pp. 39-47.

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Official URL:

http://www.ncbi.nlm.nih.gov/pubmed/12587890

Abstract

We examined the effects of pre-exercise sodium bicarbonate (NaHCO3) ingestion on the slow component of oxygen uptake (VO2) kinetics in seven professional road cyclists during intense exercise. One hour after ingesting either a placebo or NaHCO3 (0.3 g x kg body mass(-1)), each cyclist (age, 25 +/- 2 years; VO2max, 74.7 +/- 5.9 ml x kg(-1) x min(-1); mean +/- s) performed two bouts of 6 min duration at an intensity of 90% VO2max interspersed by 8 min of active recovery. Gas exchange and blood data (pH, blood lactate concentration and [HCO3-]) were collected during the tests. In both bouts, the slow component of VO2 was defined as the difference between end-exercise VO2 and the VO2 at the end of the third minute. No significant difference was found in the slow component of VO2 between conditions in the first (NaHCO3, 210 +/- 69 ml; placebo, 239 +/- 105 ml) or second trial (NaHCO3, 123 +/- 88 ml; placebo, 197 +/- 101 ml). In conclusion, pre-exercise NaHCO3 ingestion did not significantly attenuate the VO2 slow component of professional road cyclists during high-intensity exercise.

Details

Item Type Articles
CreatorsSantalla, A., Perez, M., Montilla, M., Vicente, L., Davison, R., Earnest, C. P. and Lucia, A.
DepartmentsFaculty of Humanities & Social Sciences > Health
RefereedYes
StatusPublished
ID Code29995

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