Martial arts and trumpet playing? Let's see, I definitely breath better and my core muscles get a real good work-out. This might help me play a bit stronger but so would extra time on the horn... The likelihood of getting kicked in the chops is a very real issue. So far, I've been nailed twice in the five years I have been practicing karate. I don't consider this excessive, but then again I don't play for a living either. I also don't practice full contact karate...

Ofcourse I know plenty of people who have taken a softball in the face, or a ski pole, or an elbow etc.... So what do you do? Stay home and do nothing? At this stage in my life if i couldn't play the horn anymore I would be disappointed, but it wouldn't kill me. Obviously, I am not invested in the instrument the way a lot of people on this forum are.