Funding for this research was provided by:
Bundesinstitut für Sportwissenschaft (070110/14-15)
Albert-Ludwigs-Universität Freiburg im Breisgau
Received: 10 November 2020
Accepted: 26 January 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: The procedures were approved by the Ethics committee of the University of Freiburg under reference number 602/14 and all participants gave their written informed consent before the beginning of the study.
: Not applicable.
: The authors declare that they have no competing interests.