As a coach educator, one of the most rewarding things I get to do is to try to apply the ideas of ecological dynamics into a new sport or activity (most recently, cycling and fly fishing!). When I was approached about working in martial arts back in 2019, my first thought was: well, this will be an interesting test case! Like many people who are not actively involved in martial arts, the first images that came to mind were of Bruce Lee repeating the same striking movement against a block over and over, and his famous quote: “I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.” Phew, this is going to be an uphill battle, I thought! A sport focused on strict repetition of ideal techniques did not seem like an easy place to introduce ideas such as perception-action coupling, “repetition without repetition,” and representative design! Fast forward to today, and I am delighted to see how far we have come in martial training – in particular, within the sport of Brazilian Jiu-Jitsu (BJJ). A lot of very creative, open-minded, and dedicated coaches and athletes have helped to “revolutionize” the way BJJ athletes train. And we have even changed our interpretation of how we view Bruce Lee&s;s views!