Chelnokov, A. A. http://orcid.org/0000-0003-0502-5752
Roshchina, L. V.
Gladchenko, D. A.
Pivovarova, E. A.
Piskunov, I. V.
Gorodnichev, R. M.
Article History
Received: 28 December 2020
Revised: 25 January 2021
Accepted: 30 April 2021
First Online: 19 April 2022
COMPLIANCE WITH ETHICAL STANDARDS
: All procedures performed in studies involving human participants were in accordance with the biomedical ethics principles formulated in the 1964 Helsinki Declaration and its later amendments and approved by the local bioethical committee of the Velikie Luki State Academy of Physical Education and Sports (Velikie Luki).
: <i>Conflict of interests.</i> The authors declare that they have no conflict of interest.
: <i>Informed consent.</i> Each study participant provided a signed voluntary written informed consent after explanation of the potential risks and benefits, as well as the nature of the upcoming study, to him.