Research Output

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

  We examined the effects of pre-exercise sodium bicarbonate (NaHC[O.sub.3]) ingestion on the slow component of oxygen uptake (V[O.sub.2]) kinetics in seven professional road cyclists during intense exercise. One hour after ingesting either a placebo or NaHC[O.sub.3] (0.3 g*kg body [mass.sup.-1]), each cyclist (age, 25 [+ or-] 2 years; V[O.sub.2max], 74.7 [+ or-] 5.9 ml.[kg.sup.-l]*[min.sup.-1]; mean [+ or-] s) performed two bouts of 6 min duration at an intensity of 90% V[O.sub.2max] interspersed by 8 min of active recovery. Gas exchange and blood data (pH, blood lactate concentration and [HC[O.sup.-.sub.3]]) were collected during the tests. In both bouts, the slow component of V[O.sub.2] was defined as the difference between end-exercise V[O.sub.2] and the V[O.sub.2] at the end of the third minute. No significant difference was found in the slow component of V[O.sub.2] between conditions in the first (NaHC[O.sub.3], 210 [+ or-] 69 ml; placebo, 239 [+ or-] 105 ml) or second trial (NaHC[O.sub.3], 123 [+ or-] 88 ml; placebo, 197 [+ or-] 101 mi). In conclusion, pre-exercise NaHC[O.sub.3] ingestion did not significantly attenuate the V[O.sub.2] slow component of professional road cyclists during high-intensity exercise.

  • Type:

    Article

  • Date:

    01 January 2003

  • Publication Status:

    Published

  • Publisher

    Taylor & Francis

  • DOI:

    10.1080/0264041031000070949

  • ISSN:

    1466-447X

  • Library of Congress:

    QP Physiology

Citation

Santalla, A., Perez, M., Montilla, M., Vicente, L., Davison, R., Earnest, C. & Lucia, A. (2003). Sodium bicarbonate ingestion does not alter the slow component of oxygen uptake kinetics in professional cyclists. Journal of sports sciences. 21, 39-47. doi:10.1080/0264041031000070949. ISSN 1466-447X

Authors

Keywords

Buffeting solutions; Cycling performance; Lactic acidosis, pH, Sodium bicarbonate; Oxygen uptake

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