TY JOUR TI Assessment of the effectiveness of using the concept of critical swimming speed in planning high-intensity interval training for qualified swimmers KW swimming KW critical swimming speed KW qualified swimmers KW 3-minute test JO Scientific notes of P. F. Lesgaft University AU KOPYLOV, K.V. AU Kaun, V.A. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft