Wijnand IJsselsteijn Yvonne de Kort Joyce H. D. M. Westerink Marko de Jager Ronald Bonants Fun and Sports: Enhancing the Home Fitness Experience. 46-56 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3166&spage=46 2004 conf/iwec/2004 ICEC db/conf/iwec/icec2004.html#IJsselsteijnKWJB04