Received: 22 June 2020
Accepted: 4 November 2020
First Online: 1 December 2020
Ethics approval and consent to participate
: Ethics committee of the German Sports University Cologne and is in accordance with the Declaration of Helsinki. It is registered in the German Register of Clinical Trials under the name EACSARKA and the registration number DRKS-ID: DRKS00018768.
: No individual datas are shown in this original research. All data were anonymized directly so that no conclusions can be drawn about the participants.
: The authors declare no conflict of interest.