TY JOUR TI On the issue of standardizing the volume of weekly motor activity for schoolchildren with intellectual disabilities KW motor activity KW schoolchildren with intellectual disabilities KW schoolchildren's health JO Scientific notes of P. F. Lesgaft University AU Evseev, S.P. AU Shelekhov, A.A. AU Nenahov, I.G. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft