Proceedings of the International scientific and practical conference ―New York Global Science Conference 2026‖ (May 18-20, 2026) / Publisher website: www.naukainfo.com. – New York, USA, 2026. - 322 p.

283 PHYSICAL EDUCATION, SPORTS AND PHYSICAL THERAPY UDC 796.015.6:796.332.6:612.11:612.017:612.014.46-053.6 Dychko Danylo Vladyslavovych Candidate of Biological Sciences, associate professor Dychko Olena Anatoliivna Candidate of Biological Sciences, associate professor Dychko Vladyslav Viktorovych Doctor of Biological Sciences, Professor SHEI ―Donbas State Pedagogical University‖, Sloviansk / Dnipro, Ukraine ADAPTIVE MECHANISMS OF THE BIOOD SYSTEM, CELLULAR RESISTANCE AND IMMUNJLJGICAL REACTIVE OF YOUNG FUTSAL PLAYERS IN THE SYSTEM OF SPORTS SELECTION Abstract. The article summarizes current scientific data on the adaptive mechanisms of the blood system, cellular resistance and immunological reactivity of young futsal players in the context of sports selection. It is shown that systematic physical loads in futsal cause complex functional changes in the body, involving the erythrocytic, leukocytic and thrombocytic links of the blood system, mechanisms of nonspecific defense, cellular stability and specific immune response. It has been established that the stability of hematological parameters, a high level of cellular resistance and balanced immunological reactivity reflect the effectiveness of adaptive processes and may be considered important biological criteria of sports prospects in young futsal players.