there are many martial arts practiced in rio de janeiro, one of the most popular being brazilian jiu-jitsu, bjj, which was created when the famous gracie family learned the fundamentals of kodokan judo, and adapted the style into a sport - the concept of the activity is to teach a smaller individual to defend themself with leverage and technique.

grappling and combat on the ground is common in bjj and many of the movements have found their way into other martial arts - most mma fighters learn bjj techniques to successful compete in the sport.  

rio de janeiro is filled with more bjj training facilities than any other city in the world - they can be found in every community of the city.