Is Karate a sport you can use to get into shape, or do you need to be in shape to be in karate? Here's why I ask. I used to be in Kenpo from 1999-2001. For two years, I was in a Kenpo school where I eventually got my brown belt. But then for financial reasons, I went to a new Kenpo school. This one did a lot more running and cardio, and holy crap I had trouble keeping up. Because of this and because my skills was rusty, the sensei was thinking I should have started off as an orange belt in his school.