TY JOUR TI INFLUENCE OF MARTIAL ARTS COMPETITIONS AT THE HEALTH-IMPROVING STAGE OFPREPARATION OF CHILDREN AGED 68 YEARS ON THE QUANTITATIVE SAFETY OF GROUPS KW martial arts KW preschoolers KW competitions KW initial stage of preparation JO Scientific notes of P. F. Lesgaft University AU Pastushenko, E.E. AU Pastushenko, E.E. AU Umarov, M.M. AU Sokolov, D.A. AU SHolotonov, M.A. AU Popov, A.S. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft