The physical development of children and adolescents characterizes a process of their growth and maturation of the growing body. It is a key criterion of children's health. The dynamics in the physical development of child and adolescent populations suggests that a complex of biosocial and environmental factors influences the rate of children's growth and development. The past 10-15 years have been marked by an insignificant positive dynamics of the major morphological parameters and some sex-age groups have shown their stabilization and a significant reduction in functional parameters with continuous sex maturation acceleration. There is a definite relationship between their physical development and health status. Failures in age-specific development terms (a biological age) and morphofunctional disharmony are generally accompanied by health deviations. There are more profound impairments in the physical development of an individual are, the more severe diseases are.