1. 1. Mickan BM, Ostapyak ZM, Mickan TS et al. Variabelnist sercevogo ritmu sportsmeniv. [Variability of heart rate of athletes. Rehabilitation and physical culture and recreational aspects of human development] Reabilitacijni ta fizkulturno-rekreacijni aspekti rozvitku lyudini. 2022; 12(18): 128-143. (in Ukrainian).
2. 2. Podrigalo LV, Volodchenko OA, Sokol KM, Rovna OO. Doslidzhennya variabelnosti sercevogo ritmu atletiv kikboksingu. [Study of heart rate variability of kickboxing athletes] Visnik Chernigivskogo universitetu. Seriya: Pedagogichni nauki. Fizichne vihovannya ta sport. 2017; 147 (2): 240-244 (in Ukrainian).
3. 3. Shevchuk TI, Romanyuk AP. Osoblivosti vegetativnoyi regulyaciyi sercya u sportsmeniv igrovih vidiv sportu ta legkoatletiv. [Peculiarities of autonomic regulation of the heart in athletes of game sports and track and field athletes] Visnik Harkivskogo nacionalnogo universitetu imeni V.N. Karazina. Seriya biologiya. 2016; 26: 187-195 (in Ukrainian).
4. 4. Bentley RF, Vecchiarelli E, Banks L et al. Heart rate variability and recovery following maximal exercise in endurance athletes and physically-active individuals. Appl Physiol Nutr Metab. 2020; 15. doi: 10.1139/apnm-2020-0154.
5. 5. Korobyejnikov GV, Dudnik OK, Radchenko YuA. Variabelnist sercevogo ritmu u yunih borciv z riznim funkcionalnim stanom nervovoyi sistemi. [Heart rate variability in young wrestlers with different functional states of the nervous system] Pedagogika, psihologiya ta mediko-biologichni problemi fizichnogo vihovannya i sportu: nauk.monogr. za red. Yermakov S.S. H.: HDADM. 2007; 6: 157-160. (in Ukrainian).