Brazilian jiu-jitsu (BJJ) is a martial art, combat sport, and a self defense system that focuses on grappling and especially ground fighting. The art was derived from the Japanese martial art of Kodokan judo (which itself is derived from Japanese Jujutsu) in the early 20th century.
It teaches that a smaller, weaker person can successfully defend against a bigger, stronger assailant by using leverage and proper technique – most notably by applying joint-locks and chokeholds to defeat the other person.
Brazilian Jiu Jitsu academies are a collection of almost every type of person you can think of - doctors, lawyers, students, law enforcement, businessmen and women, and more. Every day they walk into the academy for the same reason - to get better at BJJ. These same people walk into the academy every day and improve their health, learning ability, and stress levels. They may not be thinking about the many benefits of BJJ that cannot be seen, but it doesn’t matter if they can see them or not - they are happening.