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Left ventricular function during strength testing and resistance exercise in patients with left ventricular

Galila Werber-Zion1, Ehud Goldhammer, Anat Shaar

  • 1York College of The City University of New York, Jamaica 11451, USA. werber@york.cuny.edu

Journal of Cardiopulmonary Rehabilitation
|March 31, 2004
PubMed
Summary
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Cardiac patients with moderate left ventricular dysfunction showed minor changes in cardiac function during high-intensity resistance exercise. These findings suggest that strength testing is safe and does not significantly reduce cardiac performance in this population.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Cardiac Rehabilitation

Background:

  • Left ventricular dysfunction can impair cardiac performance during physical exertion.
  • Assessing cardiac function during exercise is crucial for patient safety and effective rehabilitation.

Purpose of the Study:

  • To evaluate left ventricular function in cardiac patients with moderate dysfunction during one-repetition-maximum (1-RM) strength testing and resistance exercise.
  • To compare these responses to those observed during a symptom-limited graded exercise test (SL-GXT).

Main Methods:

  • Echocardiography was used to assess left ventricular function in 15 patients (ejection fraction 42.1 +/- 5.8%).
  • Measurements were taken during 1-RM testing and resistance exercise (20-60% 1-RM) for knee extension and biceps curl (BIC).

Related Experiment Videos

  • Data were compared with SL-GXT results.

    • Main Results:

    • A slight, significant reduction in ejection fraction was noted at 60% 1-RM knee extension.
    • Systolic blood pressure and left ventricular end-systolic volume ratio increased significantly during exercise.
    • New wall motion abnormalities during resistance exercise were comparable to SL-GXT, with the highest incidence during 60% 1-RM knee extension.

    Conclusions:

    • While ischemic changes increased with higher resistance workloads and larger muscle groups, the magnitude was small.
    • These findings do not indicate a significant reduction in cardiac performance during resistance exercise in this patient group.