00689naa#a2200217#i#450# EN\\bibl\121332 20260515033347.5 1994-4683 20230803b2023####ek#y0engy0150####ca RU THE PROBLEM OF INSTABILITY OF THE LOCOMOTORAL APPARATUS OF KICKBOXERS AGED 8-9, AT THE STAGE OF INITIAL TRAINING Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 5 с. Journal article local Кик-боксинг. 796.835 uchzapiski.lesgaft.spb.ru