1. Department of Sports Medicine/Sports Physiology University of Bayreuth Bayreuth 95440 Germany
2. Respiratory and Critical Care Research Area, NIHR Biomedical Research Centre University Hospital Southampton NHS Foundation Trust/University of Southampton Southampton UK
3. Centre for Human Integrative Physiology, Faculty of Medicine University of Southampton Southampton UK
4. Centre for Human Health and Performance/ Institute of Sport, Exercise and Health University College London, and NIHR University College London Hospitals Biomedical Research Centre London UK