TY JOUR TI ON THE PROBLEM OF REALIZING THE PRINCIPLE OF PLANNED AND SYSTIMATIC TRAINING IN THE DEVELOPMENT OF YOUNG WEIGHTLIFTERS 14-15 YEARS OLD KW weightlifting KW principle of planned and systematic training KW cumulative training effect KW skipping training sessions KW competitive result JO Scientific notes of P. F. Lesgaft University AU Suleymanov, N.L. AU Ponomarev, A.A. AU Marokova, M.V. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft