Evidence for an inverse relationship between the ventilatory response to exercise and the maximum whole body oxygen consumption value

  • J. F. Morrison
  • S. van Malsen
  • T. Noakes
Article
Accepted:

Summary

Ventilatory responses to submaximal exercise loads indicate that in a population of 895 physically active and sedentary male and female subjects, exercise ventilation is inversely related to predicted VO2max. The correlation coefficients for males and females in this relationship are 0.61 (P<0.0001) and 0.26 (P<0.0001) respectively. The slopes of regression lines for V;E/VO2 and VO2max in female and male subjects are −2.59 and −0.91 respectively. This is associated with changes in composition of the expired air in that PCO2 increases and PO2 decreases with greater VO2max. The difference between the mean oxygen and carbon dioxide partial pressures in expired air of individuals in the highest and lowest VO2max ranges are 1.2 kPa (9 mm Hg) and 0.8 kPa (6 mm Hg) respectively.

Key words

Volume expired air and VO2max 
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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • J. F. Morrison
    • 1
  • S. van Malsen
    • 1
  • T. Noakes
    • 2
  1. 1.Dept. of Physiology, Godfrey Huggins School of MedicineUniversity of ZimbabweZimbabwe
  2. 2.Metropolitan Sport Science Centre, Medical SchoolUniversity of Cape TownSouth Africa

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