Parameters of physical readiness of cadets of different somatotypes on grade levels are defined. Researched - 112 cadets. The factorial frame of fluctuation of parameters is construed. Diagnosing somatotypes is conducted. The considerable variances between such frame at cadets of different somatotypes on a determined grade level are revealed. Necessity of the account of the received datas for a heating-up period of the contents of occupations is noted by physical preparation. The amount of occupations of a determined explicating directedness is defined.