Cardiovascular rehabilitation represents a very important measure in post myocardial infarction patients for both, improving their quality of life and preventing other acute cardiovascular events. It is important to accurately assess functional capacity of patients after acute coronary events, in order to optimize the results of cardiac rehabilitation program. Cardiopulmonary exercise testing (CPET) represents the gold standard in functional capacity assessment. We present 3 clinical cases of post STEMI patients, with coronary revascularization interventions, addressed to cardiovascular rehabilitation. They underwent CPET evaluation at baseline and during rehabilitation program. This method proved important utility for individualization of cardiovascular rehabilitation program, as well as for monitoring the long term evolution after myocardial infarction.