TY JOUR TI KINEMATIC CHARACTERISTICS OF SQUATTING TECHNIQUE IN BOYS 1115 YEARS OLD OF DIFFERENT BODY TYPES KW squatting technique KW boys 11-15 years old KW somatotype KW kinematic characteristics JO Scientific notes of P. F. Lesgaft University AU Grebennikova, I.N. AU Grebennikov, E.K. PY 2023 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft