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Impaired pulmonary and cardiac function after maximal exercise.

B S Rasmussen1, P Elkjaer, B Juhl

  • 1Department of Anesthesiology, Central Hospital, Holstebro, Denmark.

Journal of Sports Sciences
|January 1, 1988
PubMed
Summary
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Maximal rowing exercise temporarily reduced lung diffusing capacity and increased residual volume in athletes. These changes may indicate transient lung edema and impaired heart function following intense physical exertion.

Area of Science:

  • Sports Medicine
  • Cardiopulmonary Physiology
  • Exercise Science

Background:

  • Understanding the cardiopulmonary response to maximal exercise is crucial for athletes and clinicians.
  • Short-duration, high-intensity exercise elicits unique physiological adaptations.
  • Previous research has not fully elucidated the immediate and short-term pulmonary effects of maximal rowing.

Purpose of the Study:

  • To investigate the cardiopulmonary response to maximal rowing exercise in well-trained oarsmen.
  • To assess changes in lung diffusing capacity, lung volumes, and cardiac function post-exercise.
  • To explore potential mechanisms behind observed physiological alterations.

Main Methods:

  • Six healthy, well-trained oarsmen performed maximal rowing exercise.

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  • Measurements included lung diffusing capacity for carbon monoxide, residual volume (RV), total lung capacity, transthoracic electrical impedance, and peak expiratory flow rate (PEFR).
  • Data were collected pre-exercise and at various recovery intervals.

    • Main Results:

    • Lung diffusing capacity significantly decreased for 2.5 days post-exercise.
    • Residual volume (RV) significantly increased 30 minutes post-exercise, while total lung capacity remained unchanged.
    • Peak expiratory flow rate (PEFR) was significantly reduced at 30 minutes recovery, and a novel split impedance dZ/dt waveform indicating impaired myocardial contractility was observed in all subjects immediately post-exercise.

    Conclusions:

    • Maximal rowing exercise induces significant, transient changes in cardiopulmonary function.
    • Observed pulmonary changes may suggest interstitial lung edema and exercise-induced bronchoconstriction.
    • Impaired myocardial contractility, indicated by a novel impedance waveform, may contribute to the observed physiological responses.