Two-time Paralympic gold medalist Heinrich Popow instructed lower-limb amputees in the use of sports prosthetics on Sunday, while advocating for the pure enjoyment of sports -- what he called life's "best medicine."The German and Japanese Paralympian Atsushi Yamamoto were coaching nine amputees at a three-day running clinic in Urayasu, Chiba Prefecture, near Tokyo. The group put on prosthetics used in sports, with carbon fiber running feet, before moving on to basic exercise drills and relays."Concentrate on your own rhythm," Popow told one of the participants. "If you feel comfortable, it'…READ FULL ARTICLE