When you feel a pain in your knee, your mind might quickly go to the worst-case scenario. That reaction might be warranted or not. Here’s a simple guide to help jiu-jitsu practitioners know when it’s OK to keep training, when to be a little cautious and when it’s necessary...

Master the art of jiu-jitsu and you have mastered the science of anatomy. Understanding how the body moves and knowing what positions make us strong, and our opponents weak, is what jiu-jitsu is all about. Equally important is to know our anatomy and understand the components of the musculoskeletal...