00762naa#a2200181#i#450# EN\\bibl\98496 20251011163617.6 1994-4683 20250925b2025####ek#y0engy0150####ca RU Improving breaststroke swimming speed by developing explosive power of lower limb muscles during the stage of sports specialization Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2025 7 с. Journal article local Брасс, например,. 797.212.2 Методические основы видов спорта. 77.29 grnti Maretsky Sergey Yur'evich uchzapiski.lesgaft.spb.ru