TY JOUR TI Individual approach to the development of coordination endurance in group exercises in rhythmic gymnastics KW rhythmic gymnastics KW group exercises KW quality of performance KW coordination endurance KW psychophysiological parameters KW individual approach JO Scientific notes of P. F. Lesgaft University AU Artyuh, D.V. AU Medvedeva, E.N. AU Kiviharju, I.V. AU Baryaev, A.A. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft