Effects of Video Game Playing on the Circadian Typology and Mental Health of Young Czech and Japanese Children

Milada Krejci, Kai Wada, Miyo Nakade, Hitomi Takeuchi, Teruki Noji, Tetsuo Harada Department of Health Education, Faculty of Education, University of South Bohemia, Jeronymova, Ceske Budejovice, Czech Republic; Laboratory of Environmental Physiology, Graduate School of Integrated Sciences of Human and Nature, Kochi University, Akebonocho, Kochi, Japan; Department of Foods and Nutrition, Tokai-Gakuen University, Nagoya, Aichi, Japan; Department of Physical Education, Faculty of Education, Kochi University, Kochi, Japan. Email: [email protected] Received May 9, 2011; revised July 27, 2011; accepted September 2, 2011.