Received: 3 December 2018
Accepted: 6 June 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: Ethical approval was obtained through the Sports and Exercise Science Ethics Committee, Manchester Metropolitan University, and all participants provided informed written consent forms prior to participation. All procedures complied with the World Medical Association Declaration of Helsinki [CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.