One World Self Defense and Fitness offers Krav Maga, Brazilian JiuJitsu and CrossFit to its students. Krav Maga is a system of self defense developed in Israel. JiuJitsu is a grappling and submission technique. CrossFit is an intense fitness program meant to help you lose weight. One World's focus, aside from its fitness programs, is less on teaching discipline and more about teaching students the ability to defend themselves via these techniques.