Watch HDToday. Karate champion Chuck Norris guides you through an instructional video that's part self-defense lesson, part aerobic exercise and part master exhibition. First, Norris teaches a range of simple techniques to build competence and confidence. Next, he punches and kicks his way through a 20-minute workout. But Norris saves the best for last with a don't-try-this-at-home demonstration that will leave you breathless.