Funding: the study was performed as part of the applied research project “Developing the Guidelines on Increasing the Efficiency of the Measures for Medical and Biological Support of Juvenile Athletes of Russian National Teams” (code “Deti-22”), the Federal Research and Clinical Center of Sports Medicine and Rehabilitation of the Federal Medical Biological Agency State Assignment №107.002.22.14 of 11.07.2022.

Author contribution: Grishina ZhV, Klyuchnikov SO — data acquisition and processing, manuscript writing, editing; Feshchenko VS, Zholinskiy AV — editing, approval of the manuscript final version.