Twenty five patients with myocardial infarction were followed up under the conditions of systematic rehabilitation. They were tested by the veloergometer at the beginning of the fourth and seventh month post the coronary incident. The dynamics of the indices concerning the outer work and oxygen consumption of the myocardium was followed up. The author found that the indices of outer work (capacity of threshold loading and volume of the work carried out) reflect the improved physical capacity of the patients respectively. The dynamics of the indices for the heart work, myocardial oxygen consumption respis not so regular and puts certain problems forward. That fact demanded the inclusion of additional parameters, being revelant to the myocardial contractility. In this way, the rehabilitation regimen could be more precisely determined as well as the effectivity of the therapeutic measures carried out.