00678naa#a2200181#i#450# EN\\bibl\127592 20260717210439.5 1994-4683 20231031b2023####ek#y0engy0150####ca RU DEVELOPMENT OF SPECIAL ENDURANCE IN RUNNERS 400 METERS BASED ON INTEGRATED APPROACH FOR THE USE OF PHYSICAL ACTIVITY AND ERGOGENICS Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2023 3 с. Journal article local Бег. Например,. 796.422 Petrov D M Popkov V S uchzapiski.lesgaft.spb.ru