Brazilian Jiu-Jitsu (BJJ) is a martial art, combat sport, and a self defense system that focuses on grappling and especially ground fighting. Brazilian jiu-jitsu was formed from Kodokan Judo ground fighting (Ne-Waza) fundamentals that were taught to Carlos Gracie by master Mitsuyo Maeda. Brazilian jiu-jitsu eventually came to be its own art through the experimentations, practices, and adaptation from the Judo knowledge of Carlos and Hélio Gracie, who then passed their knowledge on to their family.
A chokehold or choke is a general term for grappling hold that critically reduces or prevents either air (choking) or blood (strangling) from passing through the neck of an opponent. The restriction may be of one or both and depends on the hold used.
An armlock in grappling is a single or double joint lock that hyperextends, hyperflexes[disambiguation needed] or hyperrotates the elbow joint and/or shoulder joint. An armlock that hyperflexes or hyperrotates the shoulder joint is referred to as a shoulder lock, and an armlock that hyperextends the elbow joint is called an armbar. Depending on the joint flexibility of a person, armlocks that hyperrotate the shoulder joint can also hyperrotate the elbow joint, and vice versa.
Submission grappling is a reference to the ground fighting tactic consisting of taking an opponent to the ground using a takedown or throw and then applying a submission hold, forcing the opponent to submit. While grapplers will often work to attain dominant position, some may be more comfortable fighting from other positions. If a grappler finds themselves unable to force a takedown, they may resort to pulling guard, whereby they physically pull their opponent into a dominant position on the ground.
The secret of this sport is, while you’re the nail, hang in there, let them hit you, until the day you become the hammer.Renzo Gracie