This one's for those too lazy to actually work out. :)
"Regular visits to a health club in the online virtual world Second Life appear to help shed the pounds in real life, say exercise scientists. Participants in two 12-week weight loss programmes - one real, and one online - lost similar amounts of weight. Indiana University researchers told a conference that confidence and motivation built in the virtual gym continued in normal life. A UK psychologist said mixing online and real world support might work best."