You might want to try Kendo. It doesn't have any distinctively colored belts or involve any back breaking. On the contrary, it has fixed my back after a cycling

You might want to try Kendo. It doesn't have any distinctively colored belts or involve any back breaking. On the contrary, it has fixed my back after a cycling accident. It has the same benefits listed in the Brazilian Jiu Jitsu article, like most martial arts.