<i>"... He began by scanning the Internet for workout tips and read that five minutes of sprinting was the equivalent of a half-hour jog. This seemed like a great shortcut—an elegant exercise hack—so ... That same afternoon, he laced up his new kicks and burst out the front door ... He took a few strides, slipped on a concrete ramp and crashed to the sidewalk, shattering his left elbow. ..."</i><p>Typical programmer error. How many times do you have to say it before it comes back to bite you ... don't prematurely optimise.