Abstract
Except for situations of acute myocardial infarction before hospital discharge, the exercise test should always be limited by symptoms, signs or exhaustive muscle fatigue and not by reaching 85% of the maximum theoretical heart rate. One of the objectives of the test is to reproduce symptoms and evaluate whether, simultaneously or not, signs of reversible ischemia appear on stress ECG, changes in rhythm or blood pressure, which presupposes not performing submaximal tests. A submaximal test does not allow maximum aerobic capacity calculation, an important prognostic factor whether in asymptomatic individuals or patients with ischemic heart disease. The greater adrenergic stimulation caused by high intensity effort, especially when the maximum aerobic capacity has been exceeded, can be decisive for the induction of potentially malignant arrhythmias when the aim is to stratify risk in certain heart diseases.
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