TY JOUR TI CHARACTERISTICS OF THE ABILITY TO REPRODUCE THE RHYTHM IN CHILDREN 79 YEARS OLD WITH DOWN SYNDROME KW children with down's syndrome KW rhythmicity of motor actions KW physical readiness KW rhythmic groups JO Scientific notes of P. F. Lesgaft University AU Kosheleva, M.V. AU Sinelnikov, D.M. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft