Received: 2 November 2020
Accepted: 24 March 2021
First Online: 7 April 2021
: The study was approved by the Institutional Review Board of the Faculty of Kinesiology, University of Zagreb, Croatia. We confirm that the Faculty of Kinesiology served as an institution, under which the study had been conducted. The informed consent voluntarily was signed by the participants, participants’ parents or their guardians.
: Not applicable.
: The authors declare that they have no competing interests.