1. Laboratory of Social Research on Physical Activity, Department of Physical Education and Sport Science at Serres, School of Physical Education and Sport Science, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Health Psychology & Behavioural Medicine Research Group, School of Psychology & Speech Pathology, Curtin University, Perth, Australia
3. Laboratory of Exercise Psychology and Quality of Life, Department of Physical Education and Sport Science, University of Thessaly, Volos, Greece