TY  JOUR
TI  Improvement of breaststroke leg technique based on the development of key areas of flexibility of swimmers 9-11 years old
KW  swimming
KW  breaststroke swimming technique
KW  children's sports
KW  flexibility
KW  range of motion
JO  Scientific notes of P. F. Lesgaft University
AU  Maretsky, S.Y.
PY  2025
IS  0
PB  National State University of Physical Education, Sports and Health named after P.F. Lesgaft