TY JOUR TI INFLUENCE OF ROPE SKIPPING CLASSES ON THE PHYSICAL PERFORMANCE OF SCHOOLCHILDREN KW physical performance KW rope skipping KW schoolchildren KW physical culture KW motor activity JO Scientific notes of P. F. Lesgaft University AU Yaroshinskaya, A.P. AU YAnkevich, I.E. AU Odincova, M.O. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft