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

Santalla, Alfredo, Perez, Margarite, Montilla, Manuel, Vicente, Lazaro, Davison, Richard, Earnest, Conrad and Lucia, Alejandro (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. ISSN 1466-447X

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Abstract/Description

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.

Item Type: Article
Print ISSN: 1466-447X
Electronic ISSN: 0264-0414
Uncontrolled Keywords: Buffeting solutions; Cycling performance; Lactic acidosis, pH, Sodium bicarbonate; Oxygen uptake
University Divisions/Research Centres: Faculty of Health, Life & Social Sciences > School of Life Sciences
Dewey Decimal Subjects: 600 Technology > 610 Medicine & health > 612 Human physiology
600 Technology > 610 Medicine & health > 611 Human anatomy, cytology & histology
Library of Congress Subjects: Q Science > QP Physiology
Item ID: 1631
Depositing User: RAE Import
Date Deposited: 13 Jun 2008 13:43
Last Modified: 13 Jun 2013 16:14
URI: http://researchrepository.napier.ac.uk/id/eprint/1631

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