If you love the high of running but hate the joint and muscle pain that often come with it, you may want to check out ChiRunning. Started by Danny Dreyer, a man who regularly runs “ultra marathons” (30- to 100-mile jogs) and wrote ChiRunning: A Revolutionary Aproach to Effortless, Injury-free Running, the method applies Tai Chi’s mind-body principles to traditional go-the-distance running. It’s supposed to eliminate things like shin splits and make jogging joyful.