TY JOUR TI IMPROVING THE SYSTEM OF PREPARATION OF A SPORTS RESERVE ON THE BASIS OF CHANGING APPROACHES TO ASSESSING THE ACHIEVEMENTS OF PARTICIPANTS KW sports reserve KW control and conversion standards KW individual approach JO Scientific notes of P. F. Lesgaft University AU , .. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft