Funding for this research was provided by:
Fachhochschule für Sport und Management Potsdam der Europäischen Sportakademie Land Brandenburg gGmbH
Received: 22 November 2021
Accepted: 19 April 2022
First Online: 1 May 2022
: The study was reviewed and approved by local ethics research committee of the University of Potsdam (submission No. 34/2018). Methods were carried out in accordance with the latest version of the Declaration of Helsinki. Parents or legal representatives of all participating children provided their written informed consent before the study started.
: Not applicable.
: The authors declare that they have no competing interests.