TY JOUR TI Intelligent motion recognition technologies in technical-biomechanical preparation of finswimmers during the stage of sports mastery refinement KW fins swimming KW motion recognition KW neural network technologies KW computer vision KW sports biomechanics KW biomechanical analysis KW digital feedback JO Scientific notes of P. F. Lesgaft University AU Dudchenko, P.P. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft