TY JOUR TI The significance of psychological and volitional indicators of mixed martial arts (MMA) athletes in the process of preparation for competitions KW mixed martial arts KW pre-competition training KW sports psychology KW psychological preparation KW willpower qualities JO Scientific notes of P. F. Lesgaft University AU Korneev, V.A. PY 2025 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft