Funding for this research was provided by:
Bundesministerium für Gesundheit (ZMVI1-2519FSB110)
Deutsche Sporthochschule Köln (DSHS)
Received: 17 March 2021
Accepted: 21 March 2021
First Online: 1 April 2021
: Human Ethics Research Committee ethics approval was obtained from the Ethics Commission of the German Sport University Cologne (136/2019); which examines studies considering the Declaration of Helsinki. The research will be conducted in accordance with the approved protocol. Participation requires a written declaration of informed consent; children require a written declaration by a parent or guardian. Participants will receive predefined code numbers; any personalized data will therefore be pseudo-anonymized initially, and after analysis completely anonymized. The anonymized data will remain at the study center of the German Sport University Cologne; European Data Protection Regulation of May 25th, 2018 will be complied.
: Not applicable.
: The authors declare that they have no competing interests.