TY JOUR TI Determination of joint mobility as a means of selection and assessment of the potential of those engaged in rhythmic gymnastics at various stages of training KW rhythmic gymnastics KW flexibility KW joint mobility KW joint hypermobility KW testing KW sports selection KW sports orientation JO Scientific notes of P. F. Lesgaft University AU Terehin, V.S. AU Suprun, A.A. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft