TY JOUR TI Assessment of the effectiveness of planned tag rugby classes with younger schoolchildren within the framework of extracurricular activities KW extracurricular activities KW younger schoolchildren KW tag rugby KW physical culture KW boys aged 9-10 years JO Scientific notes of P. F. Lesgaft University AU Golubeva, O.A. AU Kotlyar, N.N. AU Ryzhova, V.M. AU Alyoshin, I.N. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft