TY JOUR TI EVALUATION OF THE EFFECTIVENESS OF THE USE OF COMPLEX COORDINATION EXERCISES IN THE FORMATION OF THE TECHNIQUE OF SWIMMING CRAWL KW swimmers KW stage of sports specialization KW chest crawl KW difficult coordination exercises KW sports result JO Scientific notes of P. F. Lesgaft University AU Bobrova, G.V. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft