1 University of Wuerzburg, Integrative and Experimental Exercise Science, Institute for Sport Sciences, Wuerzburg 97082, Germany. Electronic address: billy.sperlich@uni-wuerzburg.de.
2 Department of Physical Education and Research Institute of Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria, Las Palmas, Spain; School of Kinesiology, University of British Columbia, Vancouver, BC, Canada.
3 School of Kinesiology, University of British Columbia, Vancouver, BC, Canada; Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden; Swedish Winter Sports Research Centre, Mid Sweden University, Östersund, Sweden.