Received: 22 April 2020
Accepted: 18 January 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: This study is a part of the project regarding the assessment of postural stability in young adolescent gymnasts which was conducted following the approval of the Senate Bioethics Committee at the Jerzy Kukuczka Academy of Physical Education in Katowice, Poland. Before experimental procedures began, written informed consent was obtained from the participants and their guardians.
: Not applicable.
: The authors declare that they have no competing interests.