1. Åstrand LaboratorySwedish School of Sport and Health SciencesStockholmSweden
2. Department of Clinical Science, Intervention, and TechnologyKarolinska InstitutetStockholmSweden
3. Health and Exercise Sciences Research GroupUniversity of StirlingStirlingUnited Kingdom
4. Swedish Winter Sports Research CentreDepartment of Health SciencesMid Sweden UniversityÖstersundSweden
5. Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden