Effects of alkalisation on the changes in circulatory, respiratory and biochemical indices induced by a short, intense exercise

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Deutscher übersetzter Titel:Auswirkungen einer induzierten Alkalose auf Kreislauf-, Atmungs- und Stoffwechselreaktionen auf kurzdauernde intensive koerperliche Belastung
Autor:Faff, J.; Ladyga, M.; Burkhard-Jagodzinska, K.; Sitkowski, D.
Erschienen in:Biology of sport
Veröffentlicht:13 (1996), 4, S. 247-257, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:0860-021X, 2083-1862
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Erfassungsnummer:PU199704203803
Quelle:BISp

Abstract des Autors

Well fit male athletes (n=9) were subjected to two cycle ergometer exercises 60 min apart, lasting 6 min each, at an intensity of 90% of their maximal oxygen uptake. The same protocol was applied 7 days later. Before every exercise, the subjects ingested 0.5 l of a mixture of sodium citrate and sodium hydrogen carbonate (1:1) in a dose of 0.3 g/kg (ALK) or of 1% NaCI, serving as placebo (PL). Alkalisation induced increases in blood pH, base excess (BE) and HCO3 (SB) concentration, both before and after the exercise, the exercise-induced changes in BE and SB being significantly higher in ALK than in PL condition, as well as following Bout I vs. Bout II. The alkalisation significantly increased the respiratory exchange ratio during the exercise and the exercise-induced levels of free fatty acids in blood plasma. The perceived exertion was slightly but significantly lower in ALK than in the PL condition. No effects of alkalisation on lung ventilation, oxygen uptake, CO2 elimination, heart rate, as well as in urea and glycerol concentrations and creatine kinase activity in plasma have been demonstrated. Verf.-Referat