00776naa#a2200193#i#450# EN\\bibl\127923 20260715214715.3 1994-4683 20230228b2023####ek#y0engy0150####ca RU STUDY OF THE EFFECTIVENESS OF THE USE OF ROPE SKIPPING ELEMENTS AS ONE OF THE FORMS OFPHYSICAL EDUCATION CLASSES IN SECONDARY SCHOOLS Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 3 с. Journal article local Вторая ступень обучения. Средняя школа. 373.5 ZHevak R R YAnkevich I E Yaroshinskaya Alevtina Pavlovna uchzapiski.lesgaft.spb.ru