TY JOUR TI Justifying the need for a comprehensive diagnostic system for individualized functional training in group settings KW health-improving physical culture KW functional training KW group classes KW personalization KW diagnostic system KW pedagogical control JO Scientific notes of P. F. Lesgaft University AU Novikov, I.S. AU Fedorova, N.I. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft