Introduction: The effort test is the most popular type of a test used for the verification of a heart disease. The main target of rehabilitation is to achieve the improvement of exercise tolerance. Material and methods: The examination group included 60 patients aged 34-76 (average 60±8,87) qualified for II period of rehabilitation. The effort test on a movable track has been carried out before and after the rehabilitation, according to the modified Bruce’s protocol. The following parameters were tested: a heart rate rest and maximum, blood pressure rest and maximum, test duration, costs of energy effort (METs), a reason for test interruption, subjective sense of tiredness, a number of breaths per minute and a maximum intake of oxygen (VO2max). For the A model, 14 patients have been qualified, B-31, C-15, D-0. In that case, the training on a cycloergometer was of a continuous type, while for the patients qualified for the B and C models, was of an interval type. Results and conclusions: The biggest part of work was done during the final 21st training. The increase in exercise tolerance was proven, due to the obtained results.