TY JOUR TI SWIMMING TRAINING FOR CHILDREN AGED 7-10 YEARS, TAKING INTO ACCOUNT MORPHOFUNCTIONAL FEATURES KW morphofunctional features KW individualization of swimming training KW children's swimming training KW initial training KW pedagogical test JO Scientific notes of P. F. Lesgaft University AU Kachalova, A.S. AU Ryabchuk, V.V. AU Prohorenko, A.A. AU Antonov, A.V. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft