1. Faculty of Physical Education, Gdansk University of Physical Education and Sport, 80-336 Gdansk, Poland
2. Department of Physiology and Biochemistry, Poznan University of Physical Education, 61-871 Poznan, Poland
3. Institute of Physical Culture Sciences, University of Szczecin, 70-453 Szczecin, Poland
4. Faculty of Psychology in Wroclaw, SWPS University of Social Sciences and Humanities, Ostrowskiego 30b, 54-238 Wroclaw, Poland