The main function of “Samozdrav” is the normalisation of the amount of CO2 in the organism, which leads to the decrease of the hypertonia of the blood vessels, in this way eliminating the reason of the arterial hypertension. Arterial hypertension is one of the main causes of arrhythmia, consequently breathing on “Samozdrav” may prevent the dysrhythmia of the heart. In addition, the normalisation of the amount of CO2 in the arterial blood prevents the alkalosis, which is also one of the factors of cardiovascular diseases, specifically arrhythmia. Exercising on “Samozdrav” normalises the breathing, evens it, prevents dyspnea and other types of breathing dysrhythmia, leading to acidosis. The heart innervation is provided by the parasympathetic nervous system, while the breathing is controlled not only by the parasympathetic nervous system. It is possible that the even breathing is capable of calming down the heartbeat.