Goal. To study the heart rate (HR) indicators in divers of different specialization in 2000, 2010, and 2020. Materials and methods. The study involved three generations of submariners (divided into groups): group A-2000, group B-2010, and group B-2020. Each group consisted of 10 boys and 10 women aged 17 to 25 years. Results. Male and female submariners of group B are characterized by higher rates of increase in resting heart rate (HR), compared to athletes of group A and B. Conclusion. The cardiovascular system is sensitive to various influences, including strenuous physical activity, but the compensatory capabilities of the heart are not unlimited and if this is not taken into account, then you can get overexertion. In our case, it was found that the heart rate, regardless of specialization, reflects the functional level of the state of the cardiovascular system in accordance with different somatotypes.