- Correspondence to Professor Kari Bø, Department of Sport Medicine, Norwegian School of Sport Sciences, Oslo 0806, Norway;
- Accepted April 23, 2017
- First published June 22, 2017.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.