TY JOUR TI Biomechanics of the stag leap take-off phase in rhythmic gymnastics KW rhythmic gymnastics KW jumping KW sports biomechanics KW tensodynamometry KW high-speed videography KW sports technique JO Scientific notes of P. F. Lesgaft University AU Pomerancev, A.A. AU Korshikov, V.M. AU Timiriazev, D.A. AU Bazhenkova, N.V. PY 2025 IS PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft