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Exercise-induced hypoxemia in older athletes

C Préfaut1, F Anselme, C Caillaud

  • 1Laboratoire de Physiologie des Interactions, Hôpital Arnaud de Villeneuve, Montpellier, France.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|January 1, 1994
PubMed
Summary

Master athletes experience exercise-induced hypoxemia, a drop in blood oxygen during exertion. This condition, also seen in young athletes, appears more frequently and at lower exercise intensities in older master athletes.

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Area of Science:

  • Exercise Physiology
  • Sports Medicine
  • Pulmonary Function

Background:

  • Elite endurance-trained young athletes can experience exercise-induced hypoxemia (EIH).
  • The occurrence of EIH in highly trained older master athletes (MA) is not well-established.

Purpose of the Study:

  • To investigate whether master athletes develop exercise-induced hypoxemia.
  • To compare the incidence and characteristics of EIH in master athletes versus young athletes.

Main Methods:

  • Incremental exercise testing was performed on 10 master athletes, 10 young athletes, and 10 control subjects.
  • Arterial blood gases were analyzed, and lung gas exchange was measured during exercise.

Main Results:

  • All master athletes exhibited EIH, with a significant decrease in arterial PO2 starting at 40% of maximal O2 uptake.

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  • EIH appeared earlier and was more pronounced in master athletes compared to young athletes.
  • Master athletes showed relative hypoventilation and a widening of the alveolar-arterial O2 difference during exercise.

    • Conclusions:

    • Master athletes are susceptible to exercise-induced hypoxemia.
    • EIH in master athletes may be attributed to relative hypoventilation and potentially increased extravascular lung water.
    • This suggests a need for further investigation into the physiological mechanisms of EIH in aging athletes.