Fedotova E.V. PROSPECTS FOR USING INDICATORS OF NON-LINEAR ANALYSIS OF HEART RATE VARIABILITY AS MARKERS OF THE FUNCTIONAL STATE OF THE ATHLETE’S BODY WHEN PERFORMING TRAINING AND TESTING LOADS. TPPC [Internet]. 2023 Oct. 18 [cited 2024 Nov. 22];(10):26-9. Available from: http://tpfk.ru/index.php/TPPC/article/view/651