Mishchenko, I., Volynskaya, E. and Korobova, S. 2021. FUNCTIONAL STATE MONITORING IN TAEKWONDO ATHLETES BY MEANS OF HEART RATE VARIABILITY IN THE PRE-COMPETITION PERIOD. Human. Sport. Medicine. 21, 2 (Jul. 2021), 42-50. DOI:https://doi.org/10.14529/hsm210205.