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VO2max during successive maximal efforts.

Carl Foster1, Erin Kuffel, Nicole Bradley

  • 1Department of Exercise and Sport Science, University of Wisconsin-La Crosse, La Crosse, WI 54601, USA. foster.carl@uwlax.edu

European Journal of Applied Physiology
|September 25, 2007
PubMed
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The maximal oxygen uptake (VO(2)max) concept is supported by findings that VO(2) remains stable during a second exercise bout. This indicates that VO(2)max is a reliable measure of aerobic capacity.

Area of Science:

  • Exercise Physiology
  • Cardiorespiratory Fitness
  • Sports Science

Background:

  • The concept of maximal oxygen uptake (VO(2)max) has been a cornerstone of exercise physiology for over 75 years.
  • Recent discussions have both challenged and defended the validity of the VO(2)max concept.
  • Understanding the reproducibility of VO(2)max is crucial for accurate assessment of aerobic capacity.

Purpose of the Study:

  • To empirically test the concept of VO(2)max by evaluating VO(2) during a second exercise bout after a maximal effort.
  • To compare VO(2)max values obtained during two separate, high-intensity exercise bouts.
  • To provide evidence supporting or refuting the classical understanding of VO(2)max.

Main Methods:

  • Two studies were conducted involving physically active non-athletes and competitive runners.

Related Experiment Videos

  • Participants performed incremental exercise tests (cycling or running) to volitional exhaustion.
  • A second exercise bout at a higher intensity was performed after a short recovery period (1-3 minutes).

    • Main Results:

    • In both studies, the highest VO(2) values from the first and second exercise bouts were not significantly different.
    • Maximal heart rate remained consistent between the two exercise bouts across both studies.
    • While maximal ventilation (V(E)) increased in the second bout for non-athletes, VO(2) did not.

    Conclusions:

    • The findings support the classical concept of VO(2)max, suggesting it is a stable physiological measure.
    • The highest VO(2) achieved during maximal incremental exercise is unlikely to change significantly during a subsequent bout.
    • This study reinforces the reliability of VO(2)max as an indicator of maximal aerobic capacity.