Effects of pH on cardiorespiratory and metabolic responses to exercise

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Deutscher übersetzter Titel:Einfluesse des pH-Wertes auf die metabolischen und kardiorespiratorischen Be-lastungsreaktionen
Autor:Jones, N.L.; Sutton, R.J.; Taylor, R.; Toews, C.J.
Erschienen in:Journal of applied physiology
Veröffentlicht:43 (1977), 6, S. 959-964, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:8750-7587, 0021-8987, 0161-7567, 1522-1601
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Erfassungsnummer:PU197806007303
Quelle:BISp

Abstract

Five male subjects performed exersise at 33, 66, and 95 order. Each study was preceded by a 3-h period in which capsules were taken by mouth, containing either CaCO3 (control), NH4Cl (acidosis), or NaHCO3 (alkalosis) in a dose of 0.3 g/kg body wt. Preexercise blood pH was 7.38 +/- 12 os. No differences were found in output, frequency, or stroke volume. The respiratory changes expected from changes in blood pH were observed, with a higher alveolar ventilation in aci- dosis. At all power outputs arterialized venous lactate was lowest in acidosis and highest in alkalosis. Plasma glyceril and free fatty acids were lowest in acidosis. Changes in blood (HCO3=) and pH were shown to have major effects on metabolism in exercise which presumably were responsible for impaired enduran-ce. Verf.-Referat