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Does appropriate endurance exercise training improve cardiac function in patients with prior myocardial infarction?
H Adachi1, A Koike, T Obayashi
1Musashino Red Cross Hospital, Tokyo, Japan.
European Heart Journal
|October 1, 1996
Summary
High-intensity endurance exercise training significantly improved cardiac function and exercise capacity in patients recovering from myocardial infarction. Moderate-intensity training also enhanced exercise capacity but not cardiac function at rest.
Area of Science:
- Cardiology
- Exercise Physiology
- Rehabilitation Medicine
Background:
- Myocardial infarction (MI) survivors often experience impaired cardiac function and reduced exercise capacity.
- Endurance exercise training is a cornerstone of cardiac rehabilitation, but optimal intensity remains debated.
Purpose of the Study:
- To investigate the effects of different intensities of endurance exercise training on cardiac function and exercise capacity in patients with a history of MI.
Main Methods:
- Twenty-nine patients post-MI were randomized into control, low-intensity, and high-intensity training groups.
- Training involved 15-minute sessions, twice daily, 5 days/week for 2 months.
- Cardiac function and exercise capacity were assessed using constant work rate and incremental exercise tests.
Main Results:
- Both training groups showed improved maximal work rate.
- High-intensity training uniquely improved resting stroke volume and ejection fraction.
- Stroke volume during heavy exercise improved in both training groups.
Conclusions:
- High-intensity endurance training enhances both exercise capacity and cardiac function in MI patients.
- While moderate-intensity training improves exercise capacity, high-intensity training is superior for improving cardiac function parameters.