Source: www.domainnews.com In June 2005, a balding, slightly overweight, perpetually T-shirt-clad26-year-old computer consultant named Dan Kaminsky decided to get inshape. He began by scanning the Internet for workout tips and read thatfive minutes of sprinting was the equivalent of a half-hour jog. Thisseemed like a great shortcut -- an elegant exercise hack -- so hebought some running shoes at the nearest Niketown. That same afternoon,he laced up his new kicks and burst out the front door of his Seattleapartment building for his first five-minute workout. He took a fewstrides, slipped on a concrete ramp and crashed to the sidewalk,shattering his left elbow.