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Related Experiment Videos

Impaired left ventricular systolic function after a half-ironman race.

M Haykowsky1, R Welsh, D Humen

  • 1Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada. mark.haykowsky@ualberta.ca

The Canadian Journal of Cardiology
|June 23, 2001
PubMed
Summary

Endurance events like the half-ironman (HI) race temporarily impair left ventricular systolic function. Left ventricular contractility and systolic function return to normal within 24 hours post-exercise.

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Area of Science:

  • Cardiovascular Physiology
  • Sports Medicine
  • Exercise Science

Background:

  • Prolonged strenuous exercise, such as triathlons, places significant demands on the cardiovascular system.
  • Understanding the impact of such events on cardiac function is crucial for athlete health and performance monitoring.

Purpose of the Study:

  • To evaluate the effects of a half-ironman (HI) race on left ventricular systolic function.
  • To assess changes in cardiac contractility and performance metrics following extreme endurance exercise.

Main Methods:

  • Nine male triathletes underwent echocardiography before, immediately after, and 24 hours after completing a half-ironman race.
  • Measurements included systolic blood pressure, heart rate, and various echocardiographic parameters assessing left ventricular function.

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Main Results:

  • The HI race led to a decrease in systolic blood pressure and fractional area change, indicating reduced systolic function.
  • An increase in heart rate and end-systolic cavity area was observed post-race, suggesting altered ventricular dynamics.
  • These changes tended to normalize within 24 hours after the cessation of exercise.

Conclusions:

  • Participation in a half-ironman race is associated with transient impairment of left ventricular contractility.
  • A temporary decline in left ventricular systolic function occurs post-HI, with recovery observed within 24 hours.