00698naa#a2200169#i#4500001001600000005001700016011001400033100004100047102000700088200014300095210011000238215001000348608002700358675008200385700003100467856003000498EN\\bibl\11338820260207045721.6##a1994-4683##a20250913b2025####ek#y0engy0150####ca##aRU1#aImprovement of breaststroke leg technique based on the development of key areas of flexibility of swimmers 9-11 years oldeJournal article1#aMoscowcNational State University of Physical Education, Sports and Health named after P.F. Lesgaftd2025##a3 с.##aJournal article2local##aПлавание без вспомогательных средств. 797.21#1aMaretskygSergey Yur'evich4#auchzapiski.lesgaft.spb.ru