1. Department of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, 62110 Serres, Greece
2. Department of Health, Exercise and Sport Sciences, University of New Mexico, Albuquerque, NM 87109, USA
3. Centre for Physiological Medicine, Medical University of Graz, Harrachgasse 21/II, 8010 Graz, Austria
4. Department of Health, Leisure, and Exercise Science, Appalachian State University, Boone, NC 28608, USA