Physical fitness of pre-military youth is a socio-military issue that occupies an important place in strengthening the country's defense capability and increasing civilian responsibility. The physical and psychological readiness of young people involved in military service directly contributes to their combat capability and spiritual endurance. Today, the formation of a healthy lifestyle among young people, the development of Physical Culture, and the strengthening of military-patriotic education are becoming an urgent problem. In this article, the scientific and theoretical foundations of physical fitness of pre-military youth are considered and the results of an experimental study are presented. In the course of the study, effective methods of physical education, the content of special training programs, ways to increase motor activity are analyzed in detail. In addition, pedagogical conditions are determined that ensure the psychological and physical readiness of young people for military service. The results of the work suggest a set of recommendations aimed at improving the quality of physical fitness of young people. These recommendations are of practical importance for use in general educational institutions and special educational institutions.