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Related Experiment Videos

Computerized tomography and pulmonary diffusing capacity in highly trained athletes after performing a triathlon

C Caillaud1, O Serre-Cousiné, F Anselme

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

Journal of Applied Physiology (Bethesda, Md. : 1985)
|October 1, 1995
PubMed
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Elite athletes experienced decreased pulmonary diffusing capacity for carbon monoxide (DLCO) and transfer coefficient (KCO) after a triathlon. This was accompanied by increased lung density and opacities on CT scans.

Area of Science:

  • Sports Medicine
  • Pulmonary Physiology
  • Radiology

Background:

  • Endurance exercise, such as triathlons, places significant stress on the respiratory system.
  • Understanding the physiological and radiological changes in the lungs post-endurance events is crucial for athlete health and performance.
  • Pulmonary diffusing capacity for carbon monoxide (DLCO) is a key indicator of gas exchange efficiency.

Purpose of the Study:

  • To investigate the impact of a triathlon on lung function and thoracic CT findings in male athletes.
  • To assess changes in DLCO, alveolar volume (VA), and transfer coefficient (KCO) before and after prolonged strenuous exercise.
  • To evaluate alterations in lung density and the presence of opacities using computed tomography (CT).

Main Methods:

  • Eight male athletes underwent DLCO and VA measurements before and after a triathlon.

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  • CT scans of the thorax were performed during breath-holding to assess lung density and opacities.
  • The transfer coefficient (KCO) was calculated as DLCO/VA.

    • Main Results:

    • A significant decrease in DLCO and KCO was observed post-triathlon.
    • Mean lung density, as measured by CT, significantly increased after the race.
    • The number of linear and polygonal opacities in the lungs also showed a significant increase.

    Conclusions:

    • Elite athletes exhibit reduced lung diffusing capacity and transfer coefficient following long-distance races.
    • CT imaging reveals increased lung density and interstitial opacities after strenuous endurance events.
    • These findings highlight the physiological strain on the lungs from intense athletic exertion.