Shlyk N. STANDRDS FOR VARIATION RANGE OF RR-INTERVALS AT REST AND IN ORTHOSTASIS IN TRAINING OF RACING SKIERS WITH DIFFERENT TYPES OF REGULATION. TPPC [Internet]. 2022 Jan. 17 [cited 2024 Apr. 29];(12):30-4. Available from: http://tpfk.ru/index.php/TPPC/article/view/76