TY JOUR TI Aspects of the training methodology for 400-800 m runners in the student club KW athletics KW 400-800 m running KW student sports club KW digital systems JO Scientific notes of P. F. Lesgaft University AU Vanina, O.S. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft