Systematic handball training stimulates the entire body and especially the heart. To improve the methods of practicing handball, it is necessary to further study the aspects of adapting the heart of young handball players to regular training. The study aims to find out the dynamics of the functional capabilities of the heart in youth handball players. The observation was carried out on 25 completely healthy youth handball players with at least 2 years of sports training experience. The control group included 24 healthy young men who did not go in for sports during their life. In all cases, the study was carried out on an SSD-80 "Aloka" ultrasound device (Japan), finding out several indicators of heart function. Statistical processing of all the results of the study was performed using the Student's t-test. The phenomena of mild hypertrophy of the wall of the left ventricle were revealed in young handball players. This was indicated by an increase in the thickness of the muscle of the posterior wall and an increase in the mass of the left ventricle of the heart myocardium. In all handball players, the volume of the left cardiac ventricle was optimal. They are also characterized by a high rate of diastole realization when compared with young men in the control group. Systematic handball exercises strengthen the entire body. Handball promotes the growth of muscle mass in the wall of the left ventricle, which significantly increases its ability to work and stimulates blood supply to the whole body.
