TY JOUR TI Staged-wave adaptation method for fin-swimmers transitioning to monofin in the aspect of injury prevention KW fins swimming KW monofin KW stage-wave model KW range of motion of the ankle joint KW video biomechanical feedback KW injury prevention KW youth sports KW sports biomechanics 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