TY JOUR TI Analysis of performances in competitions by qualified sprinters-crawlers as an external criterion for the effectiveness of the developed concept of improving their training system, based on individualization of the training process KW sports training KW training process KW individualization of training KW swimming KW sprint crawl JO Scientific notes of P. F. Lesgaft University AU Prigoda, G.S. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft