00779naa#a2200193#i#450# EN\\bibl\98620 20251010192238.5 1994-4683 20250925b2025####ek#y0engy0150####ca RU Improvement of sports training in BMX freestyle for 16- to 18-year-old riders Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2025 6 с. Journal article local Велосипедный спорт. Велогонки. 796.61 Методические основы видов спорта. 77.29 grnti Nikiforov Dmitry Evgenievich Nikiforova Ol'ga Nikolaevna uchzapiski.lesgaft.spb.ru