TY JOUR TI Dynamics of the psychophysiological state of young boxers during the competitive training period KW boxing KW competitive period KW youth sports KW pre-start preparation KW psychophysiological state KW executive functions JO Scientific notes of P. F. Lesgaft University AU Timoshin, P.A. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft