Funding for this research was provided by:
Swedish Scientific Council (K2014-99X-21876-04-4)
Västerbotten County Council (ALFVLL217301)
IngaBritt and Arne Lundberg’s Research Foundation (363)
Swedish Scientific Research Council for Sports Science (-)
Umeå University School of Sport Science (-)
Umeå University (-)
Konung Gustaf V:s och Drottning Victorias Frimurarestiftelse (-)
Received: 25 April 2019
Accepted: 10 October 2019
First Online: 25 October 2019
Ethics approval and consent to participate
: All participants received prior information about the study before providing their written informed consent in accordance with the declaration of Helsinki. The study was approved by the Regional Ethical Review Board of Umeå, Sweden (registration number 08-211 M).
: Not applicable.
: All authors declare that they have no competing interests.