1. Department of Medical Sciences in Sport, Faculty of Sport, University of Ljubljana , Gortanova ulica 22 , Ljubljana 1000, Slovenia
2. John Ochsner Heart and Vascular Institute, Ochsner Clinical School, The University of Queensland School of Medicine , New Orleans, LA , USA
3. Department of Medical BioSciences, Exercise Physiology Research Group, Radboud University Medical Centre , Nijmegen , The Netherlands