The functional inspection of cardiac activity is conducted at 80 physically trained and untrained students, who have been surveyed about the maintenance of cadmium, potassium and calcium in an organism. The research of the element balance of students revealed that study of chemical elements in the organism of sportsmen was more satisfactory, than for the physically untrained students which showed the deficit of essential elements. The research of features of reaction of the cardiovascular system on the physical loading showed that physiological role of toxic cadmium for the state of the cardiovascular system was more expressed for sportsmen, than for the physically untrained students, though its content in an organism was within the limits of the existing norm. The physiological role toxic and essential elements for an action of the heart of sportsmen and the persons who are not going in for sports is revealed.