TY JOUR TI Increasing the reliability of the performance of competitive programs in group exercises of rhythmic gymnastics KW rhythmic gymnastics KW group exercises KW reliability of performance in competitive programs KW coordination difficulty KW fatigue JO Scientific notes of P. F. Lesgaft University AU Malneva, A.S. AU Artyuh, D.V. AU Pelenicina, E.D. AU Sirotina, E.S. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft