Brazilian Jiu-Jitsu (BJJ) is a martial art and combat sport that focuses on grappling and especially ground fighting with the goal of gaining a dominant position and using joint-locks and chokeholds to force an opponent to submit or be knocked out depending on what submission method is used. The art was based on early 20th century Kodokan Judo, which was itself then a recently-developed system (founded in 1882), based on multiple schools (or Ryu) of Japanese Jujutsu.

It promotes the principle that a smaller, weaker person using leverage and proper technique can successfully defend against a bigger, stronger assailant. It primarily uses Judo takedowns to gain the dominant position. BJJ can be trained for self defense, sport grappling tournaments (gi and no-gi) and mixed martial arts (MMA) competition.  Sparring (commonly referred to as 'rolling') and live drilling play a major role in training, and a premium is placed on performance, especially in competition.

Prominence

Brazilian Jiu-Jitsu came to international prominence in the martial arts community in the 1990s, when Brazilian Jiu-Jitsu expert Royce Gracie won the first, second and fourth Ultimate Fighting Championships, which at the time were single elimination martial arts tournaments. Royce fought against often much-larger opponents who were practicing other styles, including boxing, shoot-fighting, karate, judo, tae kwon do and wrestling. It has since become a staple art for many MMA fighters and is largely credited for bringing wide-spread attention to the importance of ground fighting. Sport BJJ tournaments continue to grow in popularity worldwide and have given rise to no-gi submission grappling tournaments, such as the ADCC Submission Wrestling World Championship.

Combat Strategy

Renzo Gracie wrote in his book Mastering Jujitsu: "The classical jujutsu of old Japan appeared to have no common strategy to guide a combatant over the course of a fight. Indeed, this was one of Kano's most fundamental and perceptive criticisms of the classical program." Maeda not only taught the art of judo to Carlos Gracie, but also taught a particular philosophy about the nature of combat developed by Kano, and further refined by Maeda based on his world-wide travels competing against fighters skilled in a wide variety of martial arts.

The book details Maeda's theory as arguing that physical combat could be broken down into distinct phases, such as the striking phase, the grappling phase, the ground phase, etc. Thus, it was a smart fighter's task to keep the fight located in the phase of combat that best suited his own strengths.

Renzo Gracie stated that this was a fundamental influence on the Gracie approach to combat. These strategies were further perfected over time by the Gracies and others, and became prominent in contemporary MMA.

Style Of Fighting

Brazilian Jiu-Jitsu emphasizes ground fighting techniques and submission holds involving joint-locks and chokeholds also found in numerous other arts with or without ground fighting emphasis. The premise is that most of the advantage of a larger, stronger opponent comes from superior reach and more powerful strikes, both of which are somewhat negated when grappling on the ground.

BJJ permits a wide variety of techniques to take the fight to the ground after taking a grip. Once the opponent is on the ground, a number of maneuvers (and counter-maneuvers) are available to manipulate the opponent into a suitable position for the application of a submission technique. Achieving a dominant position on the ground is one of the hallmarks of the BJJ style, and includes effective use of the guard position to defend oneself from bottom, and passing the guard to dominate from top position with side control, mount, and back mount positions. This system of maneuvering and manipulation can be likened to a form of kinetic chess when utilized by two experienced practitioners. A submission hold is the equivalent of checkmate in the sport. However, it is possible for a combat situation to continue even after a proper submission is performed.

 Types Of Submission

The majority of submission holds can be grouped into two broad categories: joint locks and chokes. Joint locks typically involve isolating an opponent's limb and creating a lever with the body position which will force the joint to move past its normal range of motion, generally referred to as hyperextension. Pressure is increased in a controlled manner and released if the opponent cannot escape the hold and signals defeat by submitting. Opponents can indicate submission verbally or they can tap out (i.e. tap the opponent, the mat, or even themselves, several times.) A choke hold, disrupting the blood supply to the brain, can cause unconsciousness if the opponent does not submit soon enough.

A less common type of submission hold is a compression lock, where the muscle of an opponent is compressed against a hard, large bone (commonly the shin or wrist), causing significant pain to the opponent. These types of locks are not usually allowed in competition due to the high risk of tearing muscle tissue. This type of lock often also hyper-extends the joint in the opposite direction, pulling it apart.

 Joint Locks

While many joint locks are permitted, most competitions bar or restrict some or all joint locks involving the knees, ankles, and spine. The reason for this is that the angles of manipulation required to cause pain are nearly the same as those that would cause serious injury. Joint locks that require a twisting motion of the knee (called twisting knee locks or twisting knee bars, or techniques such as heel hooks, and toe holds) are usually banned in competitions because successfully completing the move nearly always results in permanent damage that requires surgery. Similarly, joint manipulations of the spine are typically barred due to the inherent danger of crushing or mis-aligning cervical vertebrae. Leglocks are allowed in varying degrees depending on skill level, with straight ankle locks being the only leglocks allowed in the beginner division, or white belt level, straight kneebars being allowed in the intermediate division, or blue belt level and toeholds with the pressure applied inwards are allowed in the advanced division (purple, brown, black).

However, most joint locks involving the wrist, elbow, shoulder or ankle are permitted as there is a great deal more flexibility in those joints and those locks are safe to use under tournament conditions. Also, some fighters practice moves whose sole purpose is to inflict pain upon their opponent, in the hope that they will tap out. This includes driving knuckles into pressure points, holding their opponent's head in order to tire out the neck (called the "can opener" or kubi-hishigi) and putting body weight on top of the sternum, floating ribs, or similarly sensitive bones. These moves are not true submission moves - they are generally only used as distractions mostly in lower levels of competition. They are avoided or aggressively countered in middle to upper levels of competition.

 Chokes And Strangles

Chokes and strangles (commonly but somewhat incorrectly referred to as "air chokes" and "blood chokes" respectively) are a common form of submission. Chokes involve constriction of the windpipe (causing asphyxia.) Strangles involve constriction of the carotid artery (causing ischemia.)

Air chokes are less efficient than strangles and may result in damage to the opponent's trachea, sometimes even resulting in death. By contrast, blood chokes (strangulations) cut the flow of blood to the opponent's brain, causing a rapid loss of consciousness without damaging any internal structures. Being "choked-out" in this way is relatively safe as long as the choke is released soon enough after unconsciousness, letting blood back into the brain before oxygen deprivation damage begins. However, it should not be practiced unsupervised.

The prevalence of the more dangerous "air" chokes has led to the banning of choke holds from some United States police departments. Because of the negative legal connotations of the words "choke" and "strangulation", it is advisable to use the term "lateral vascular restraint" when describing a blood choke used in a self-defense situation.

 Training Methods

Sport Brazilian Jiu-Jitsu's focus on submissions without the use of strikes while training allows practitioners to practice at full speed and with full power, resembling the effort used in a real competition. Training methods include technique drills in which techniques are practiced against a non-resisting partner; isolation sparring where only a certain technique or sets of techniques are used against full resistance; and full sparring in which each opponent tries to submit their opponent using any legal technique. Physical conditioning is also an important part of training at many clubs.

 Grading

Junior belt colors (15 and under)

White
Yellow
Orange
Green

The standards for grading and belt promotions vary between schools, but the widely accepted measures of a person's skill and rank in Brazilian Jiu-Jitsu are:

1. The amount of technical knowledge they can demonstrate, and
2. Their performance in sparring and competition.

Technical knowledge is judged by the number of techniques a person can perform, and the level of skill with which he performs them in sparring and competition. This allows for smaller and older practitioners to be recognized for their knowledge though they may not be the strongest fighters in the school. It is a distinctly individual sport, and practitioners are encouraged to adapt the techniques to make them work for their body type, strategic preferences, and level of athleticism. The ultimate criterion is the ability to execute the techniques successfully, rather than strict stylistic compliance.

Competitions play an important role in Brazilian Jiu-Jitsu gradings, as they allow an instructor to compare the level of his

Adult belt colors (16 and over)

White
Blue
Purple
Brown
Black
Red

 students against those of the same rank from other schools. A belt promotion may be given after success in a competition, particularly at the lower belt levels. A promotion might also be awarded when a person can submit most people in his school of the same rank, e.g. a white belt who consistently submits most other white belts in sparring and is starting to catch blue belts.

The high level of competition between schools - and its importance for belt promotion - is also considered to be one of the key factors preventing instructors from lowering standards or allowing people to buy their way up the belts. Instructors may also take the personality of the person and their behavior outside of class into account, and may refuse to promote someone if they exhibit antisocial or destructive tendencies. It is by these and other criteria that most instructors promote their students. Some schools may also have formal testing which might include oral or written exams.

Some schools use a stripe system for each belt level, indicating progress through that belt.

Some schools use slightly different belt systems, such as having more colored belts before blue belt, but the above are the only widely accepted ranks as they are the standards for tournaments. There are minimum age requirements for belt promotions. Blue belts are never awarded to anyone under the age of 16. For promotion to black belt the minimum age is 19 years old according to the main regulating body of Brazilian Jiu-Jitsu, the International Brazilian Jiu-Jitsu Federation.

Stripes may be awarded to any rank below black belt, but like the belts themselves, they tend to be given at the instructor's discretion, and may be in recognition of accomplishments like noticeable improvement or tournament victories. However, not all schools award stripes, or award them consistently, so the number of stripes a person has is not necessarily a good measure of their accomplishments or time in training. When they are used, it is standard for a student to receive four stripes before being promoted to the next rank.

Black belts can receive degrees, up to 9th degree, for as long as they train or teach the art. At 7th degree, the black belt is replaced by an alternately red and black belt. At 9th & 10th degree, the belt becomes solid red. Only the founding Gracie Brothers Helio, Carlos & his brothers will ever have the 10th degree red belt. The Gracie family members who are 9th degrees belt holders are Carlson Gracie, Reylson Gracie, Relson Gracie, and Rorion Gracie.

The belts have become fauded however. Some gyms give out belts before they are earned. That is why it is not uncommon for a lower level belt to beat an upper level belt. For example a blue belt beating a brown belt in competition.

BJJ differs in some aspects from other martial arts in the criteria for grade promotion, which is almost exclusively based on practical expertise in randori (free sparring, or rolling) and championship results. It's expected, although not always the case, that any BJJ black belt is extremely proficient in every applied aspect of BJJ and also perform well in competition. Less emphasis is given to theoretical and background knowledge. Rarely is any formal test undertaken for the grading, which is based mainly in observation at every-day practice sessions.

There is a vast difference in how often belt progression takes place, and the requirements for the progression. More traditional schools and especially Gracie-affiliated schools believe that black belt cannot be achieved in under 8 to 10 years, while some schools allow students to achieve black belt more quickly.

A blue belt will typically take 1-3 years to earn. Depending on the amount of time the student puts in, and how quickly they learn. A purple belt can take 3-6 years to earn. Again, this depends largely on the individual student, and the frequency of training. A purple belt is generally accepted as being able to open his or her own school. Brown belt is considered an elite rank. Typically a student who has earned a brown belt will one day receive his or her black belt. Earning a black belt is not guaranteed in BJJ.