Mariusz Naczk received his Ph.D. in Sport Sciences from the University of Physical Education in Poznań, Poland in 2008, and habilitation in 2016. He previously worked as an academic teacher and researcher at the University School of Physical Education in Poznań (2000–2018). In 2018, he moved to the University of Zielona Góra, where he was promoted to Associate Professor. He currently works as the Head of the Department of Applied and Clinical Physiology and as the Vice-Rector for Finance and Development at the University of Zielona Góra. He conducts research projects funded by the Polish Agency for Enterprise Development (PARP) and other public sources, and he is a co-author of the Polish patent (No. 230352) for an inertial training device. His research topics mainly include exercise and sport physiology, strength and flywheel resistance training, rehabilitation, physical activity, and muscle physiology in children and older adults.