TY JOUR TI COMPARATIVE ANALYSIS OF THE DYNAMICS OF MUSCLE STRENGTH AND ENDURANCE DURING INTERVAL TRAINING KW interval training KW physical fitness KW endurance JO Scientific notes of P. F. Lesgaft University AU Snimshchikova, O.A. AU Spivak, A.Y. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft