TY JOUR TI Assessment of the effectiveness of a swimmer's undulatory exit after the start KW competitive swimming KW swimmer's undulatory exit after the start KW training process JO Scientific notes of P. F. Lesgaft University AU Kabanov, A.A. AU Kabanov, A.A. AU Ushkov, Y.S. AU Rusakova, I.V. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft