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Int J Sports Med 1984; 05(4): 193-197
DOI: 10.1055/s-2008-1025904
© Georg Thieme Verlag Stuttgart · New York

Pulmonary Ventilation in Relation to Oxygen Uptake and Carbon Dioxide Production During Incremental Load Work

R. D. Hagan*, M. G. Smith
  • Institute for Aerobics Research, 12200 Preston Road, Dallas, Texas 75230
* Dr. Hagan's new address is: Institute for Human Fitness, Texas College of Osteopathic Medicine, 1501 Merrimac Circle, Fort Worth, Texas 76107
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Publication History

Publication Date:
14 March 2008 (online)

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Abstract

The purposes of the present investigation were: (1) to describe the relationships between exercise pulmonary ventilation V̇E) and oxygen uptake (V̇2) and V̇E and carbon dioxide production (V̇CO2), (2) to determine the % V̇O2 max at the lowest ventilatory equivalent of oxygen (VEO2 ), and (3) to examine the relationship between the % V̇O2max at the lowest V̇EO2 and maximal aerobic power (V̇O2max). During incremental load work, V̇E increased exponentially in relation to elevations in V̇O2 and V̇CO2. Differentiation of the V̇E to V̇O2 exponential equation gives the minimum slope of the equation and corresponds to the lowest ventilatory equivalent for oxygen. In our subjects, V̇O2max (X̄ ± SD) was 3.84 ± 0.71 l·min-1, and V̇O2 at the lowest V̇EO2 was 1.70 ± 0.32 l·min-1. The V̇O2 at the lowest V̇EO2 was 44.3 ± 4.0% V̇O2max (range 37% to 53% V̇O2max). The correlation coefficient (r) between V̇O2 at the lowest V̇EO2 and V̇O2max was 0.90, while the r between % V̇O2max at the lowest V̇EO2 and V̇O2max was -0.24.

Key words

gas exchange measures - incremental load work

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