Sodium bicarbonate ingestion does not alter the slow component of oxygen uptake kinetics in professional cyclists
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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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.
|Creators||Santalla, A., Perez, M., Montilla, M., Vicente, L., Davison, R., Earnest, C. P. and Lucia, A.|
|Departments||Faculty of Humanities & Social Sciences > Health|
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