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”. Theory and Practice of Physical Culture, no. 10 (October 18, 2023): 26–29. Accessed November 1, 2024. http://tpfk.ru/index.php/TPPC/article/view/651.