Sodium bicarbonate ingestion does not alter the slow component of oxygen uptake kinetics in professional cyclists
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| Deutscher übersetzter Titel: | Natriumbikarbonatzugabe verändert nicht die langsame Komponente der Sauerstoffaufnahmekinetik bei professionellen Radfahrern |
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| Autor: | Santalla Hernández, Alfredo; Pérez, Margarita; Montilla, Manuel ; Vicente, Lázaro; Davison, Robert Charles Richard; Earnest, Conrad ; Lucía, Alejandro |
| Erschienen in: | Journal of sports sciences |
| Veröffentlicht: | 21 (2003), 1, S. 39-47, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource |
| Sprache: | Englisch |
| ISSN: | 0264-0414, 1466-447X |
| DOI: | 10.1080/0264041031000070949 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU201001001104 |
| Quelle: | BISp |
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/kg body mass(-1)), each cyclist (age, 25 +/- 2 years; VO2max, 74.7 +/- 5.9 ml x kg/min; 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. Verf.-Referat