I've been in martial arts since 1970 and I taught most of those years. You want to learn something? Well, here's what I tell people that what to learn martial arts; because a person has a black belt does not make them a good instructor, that's why it's smart to shop around and maybe even try a couple or three for a couple of months. I'm small 5'2" slim and small bone. I tried out several different arts and finally, one day, I walked by a door to do an errand and I heard shouting. Looking down a dark hallway, a lighted area of mats opened up. Two student in GI's were moving in a way that entranced me; it was Tracy Kenpo karate. I earned my black belt and I also taught there beginning at Blue belt. later I went to the art the Tracy was an offshoot of, American Kenpo (Ed Parker's) and earned my black belt there. Then I went to several aikido dojos and learned some more stuff. You can learn more stuff in martial arts than you have a life to practice in.I am a student of Gert Jan ketelaar in WSL VT. Hope I can add to the understanding here and also learn something in the process.