The properties of erythrocytes strongly determine the course of the entire microcirculation and metabolism in the body. Elucidation of the state of students who had long-term low physical fitness and began to regularly perform feasible physical exercises can track the progress of optimization of erythrocyte parameters that are significant for microcirculation. The study involved 42 male students who had low physical activity throughout their future life and who began regular athletics training 3 times a week. The control group included 46 students who, for at least 7 years, regularly experienced athletics loads at least 3 times a week. The work uses standard proven biochemical, hematological, and statistical research methods. After six months of physical training in the blood of students, previously poorly physically trained, normalization of metabolites of arachidonic acid, a decrease in the amount of cholesterol and acyl hydroperoxides in erythrocytes, and an increase in the level of phospholipids in them. During these periods, the students who started training experienced an increase in the number of erythrocytes-discocytes and a decrease in the number of all altered forms of erythrocytes. For students with low physical activity, who began regular physical training, a gradual improvement in the surface properties of erythrocytes is characteristic, which facilitated the processes of microcirculation in tissues.

The work was carried out on 36 clinically healthy young basketball players aged 17-21 years old, training in the basketball section for at least 3 years. The created control group consisted of 26 clinically healthy young men aged 17 to 21, who had not previously been involved in any kind of sports. In the study, the examined were subjected to ultrasound examination using an SSD-80 "Aloka" device (Japan) with an assessment of the morphological and functional characteristics of the heart. The statistical analysis of the obtained results of the study was carried out using a personal computer using the Student's t-criterion. Some signs of the development of left ventricular muscle hypertrophy were found in young basketball players. At the same time, the basketball players retained the optimum volume of the left cardiac ventricle. The youth basketball players also had a higher diastole rate compared to the control group. Regular basketball training can strengthen the body. They lead to an increase in the muscle mass of the left ventricle, which increases its functional potential and provides an optimal blood supply to internal organs.