"Zander Urquhart, 32, is thought to be the first fitness expert to adopt the Nintendo Wii as an exercise machine. Four people at a time can exercise using the Wii's unique motion-sensitive controller to mimic a tennis racket, baseball bat, golf club or boxing gloves. University studies suggest players can burn 125 calories during a 15-minute session."
Quite impressive for all those people that thought Wii wouldn't help your fitness!
"A study by Liverpool John Moores University found that in an average 12.2-hour gaming week, Wii players can burn 1830 calories - shifting 27lb a year."
So its quite simple, Nintendo fanboys will be fitter than Sony or Microsoft fanboys, nuff said.