For citations:

Ivanov D.I., Znakova I.O. MONITORING OF FUNCTIONAL STATUS OF QUALIFIED BIATHLONISTS BASED ON EVALUATION OF HEART RATE VARIABILITY. Severny region: nauka, obrazovanie, kultura. 2022;(3 (51)):35-41. (In Russ.) https://doi.org/10.34822/2312-377X-2022-3-35-41