They could follow the path taken by judo and karate and become a sport (ie mock fighting) or a form of self-defense. That will include meditation, mental contro

They could follow the path taken by judo and karate and become a sport (ie mock fighting) or a form of self-defense. That will include meditation, mental control and confidence-building which are all benefits. The original purpose of hand-to-hand combat will not be of much use in these times.