A joint lock is a

grappling Grappling is a fighting technique based on throws, trips, sweeps, clinch fighting, ground fighting and submission holds. Grappling contests often involve takedowns and ground control, and may end when a contestant concedes defeat. Shou ...

technique involving manipulation of an opponent's

joint A joint or articulation (or articular surface) is the connection made between bones, ossicles, or other hard structures in the body which link an animal's skeletal system into a functional whole.Saladin, Ken. Anatomy & Physiology. 7th ed. McGraw- ...

s in such a way that the joints reach their maximal degree of motion and hyperextension. In judō these are referred to as (, "joint locking technique"Ohlenkamp, Neil
Classification of Techniques in Kodokan Judo
''judoinfo.com''. Accessed February 26, 2006.) and in

Chinese martial arts Chinese martial arts, commonly referred to with umbrella terms Kung fu (term), kung fu (; ), kuoshu () or wushu (sport), wushu (), are Styles of Chinese martial arts, multiple fighting styles that have developed over the centuries in Greater Ch ...

as '' qin na'', which literally means "catching and locking". In Korea these are referred to as (, joint skill) or (, joint breaking). Joint locks typically involve isolating a particular joint,

lever A lever is a simple machine consisting of a beam (structure), beam or rigid rod pivoted at a fixed hinge, or '':wikt:fulcrum, fulcrum''. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, l ...

ing it in an attempt to force the joint to move past its normal range of motion. Joint locks generate varying degrees of pain in the joints and, if applied forcefully and/or suddenly, may cause

injury Injury is physiological damage to the living tissue of any organism, whether in humans, in other animals, or in plants. Injuries can be caused in many ways, including mechanically with penetration by sharp objects such as teeth or with ...

, such as

muscle Muscle is a soft tissue, one of the four basic types of animal tissue. There are three types of muscle tissue in vertebrates: skeletal muscle, cardiac muscle, and smooth muscle. Muscle tissue gives skeletal muscles the ability to muscle contra ...

tendon A tendon or sinew is a tough band of fibrous connective tissue, dense fibrous connective tissue that connects skeletal muscle, muscle to bone. It sends the mechanical forces of muscle contraction to the skeletal system, while withstanding tensi ...

and

ligament A ligament is a type of fibrous connective tissue in the body that connects bones to other bones. It also connects flight feathers to bones, in dinosaurs and birds. All 30,000 species of amniotes (land animals with internal bones) have liga ...

damage and even

dislocation In materials science, a dislocation or Taylor's dislocation is a linear crystallographic defect or irregularity within a crystal structure that contains an abrupt change in the arrangement of atoms. The movement of dislocations allow atoms to sli ...

bone fracture A bone fracture (abbreviated FRX or Fx, Fx, or #) is a medical condition in which there is a partial or complete break in the continuity of any bone in the body. In more severe cases, the bone may be broken into several fragments, known as a ''c ...

. In

judo is an unarmed gendai budō, modern Japanese martial art, combat sport, Olympic sport (since 1964), and the most prominent form of jacket wrestling competed internationally.『日本大百科全書』電子版【柔道】(CD-ROM version of Encyc ...

, the combining of standing locks with throws is forbidden due to the risk of physical harm to the falling opponent, while Brazilian jiu-jitsu,

jujutsu Jujutsu ( , or ), also known as jiu-jitsu and ju-jitsu (both ), is a Japanese martial art and a system of close combat that can be used in a defensive or offensive manner to kill or subdue one or more weaponless or armed and armored opponent ...

, taijutsu,

aikido Aikido ( , , , ) is a gendai budō, modern Japanese martial art which is split into many different styles including Iwama Ryu, Iwama Shin Shin Aiki Shuren Kai, Shodokan Aikido, Yoshinkan, Renshinkai, Aikikai, and Ki Aikido. Aikido is now practic ...

, sambo, and

hapkido Hapkido ( , , ), also spelled ''hap ki do'' or ''hapki-do'' is a Korean martial art. It is a hybrid form of self-defense that employs joint locks, grappling, chokeholds, throwing techniques, kicks, punches, and other striking attacks. ...

allow their use.

Types

Joint locks can be divided into five general types according to which section of the body they affect: *

Armlock An armlock in grappling is a single or double joint lock that Anatomical terms of motion#General motion, hyperextends, hyperflexes or hyperrotates the elbow, elbow joint or glenohumeral joint, shoulder joint. An armpit lock is very useful; it w ...

s *

Leglock A leglock is a joint lock that is directed at joints of the human leg, leg such as the ankle, knee or hip joint. A leglock which is directed at joints in the foot is sometimes referred to as a foot lock and a lock at the hip as a hip lock. Leglock ...

s *

Small joint manipulation Small joint manipulation, in grappling, refers to twisting, pulling or bending fingers, toes, wrists and ankles to cause joint locks in the various joints in those appendages. Technique Most small joint manipulation is done on the hands or ...

Spinal lock In combat sports, a spinal lock is a multiple joint lock applied to the spinal column, which is performed by forcing the spine beyond its normal ranges of motion. This is typically done by bending or twisting the head or upper body into abnormal ...

s *

Wristlock A wristlock is a joint lock primarily affecting the wrist-joint and, in some cases, the radioulnar joints through rotation of the hand. A wristlock is typically applied by grabbing the opponent's hand, and bending and/or twisting it. Wristlocks ...

s These general types can be further divided into subtypes according to which specific joint(s) they affect, or the type of motion they involve.

Usage

Joint locks are commonly featured in all forms of

, whether it be in

martial arts Martial arts are codified systems and traditions of combat practiced for a number of reasons such as self-defence; military and law enforcement applications; combat sport, competition; physical, mental, and spiritual development; entertainment; ...

self-defense Self-defense (self-defence primarily in Commonwealth English) is a countermeasure that involves defending the health and well-being of oneself from harm. The use of the right of self-defense as a legal justification for the use of Force (law), ...

combat sport A combat sport, or fighting sport, is a contact sport that usually involves one-on-one combat. In many combat sports, a contestant wins by scoring more points than the opponent, submitting the opponent with a hold, disabling the opponent (''knock ...

or hand to hand combat application. The variants involving lesser levering on a smaller

(such as wristlocks) are often featured in law-enforcement or

application, where they are used as

pain compliance holds A grappling hold, commonly referred to simply as a hold that in Japanese language, Japanese is referred to as ''katame-waza'' ( "grappling technique"), is any specific grappling, wrestling, judo, or other martial art grip that is applied to an ...

. Joint locks that involve full body leverage can on the other hand be used in hand to hand combat to partially or fully disable an opponent, by tearing major joints such as

knee In humans and other primates, the knee joins the thigh with the leg and consists of two joints: one between the femur and tibia (tibiofemoral joint), and one between the femur and patella (patellofemoral joint). It is the largest joint in the hu ...

s or

elbow The elbow is the region between the upper arm and the forearm that surrounds the elbow joint. The elbow includes prominent landmarks such as the olecranon, the cubital fossa (also called the chelidon, or the elbow pit), and the lateral and t ...

s. Common

featuring joint locks include

Aikido Aikido ( , , , ) is a gendai budō, modern Japanese martial art which is split into many different styles including Iwama Ryu, Iwama Shin Shin Aiki Shuren Kai, Shodokan Aikido, Yoshinkan, Renshinkai, Aikikai, and Ki Aikido. Aikido is now practic ...

, Brazilian Jiu-Jitsu,

Catch Wrestling Catch wrestling (also known as catch-as-catch-can) is an English wrestling style where wrestlers aim to win by Pin (sport wrestling), pinning or Submission (combat sports), submitting their opponent using any legal holds or techniques. It emph ...

Eskrima Arnis, also known as kali or eskrima/escrima, is the national martial art of the Philippines. These three terms are, sometimes, interchangeable in referring to traditional martial arts of the Philippines ("Filipino Martial Arts", or FMA), whi ...

Eagle Claw Eagle Claw (; pinyin: yīng zhǎo pài; ''eagle claw school'') is a style of Chinese martial arts known for its gripping techniques, system of joint locks, takedowns, and pressure point strikes, which is representative of Chinese grappling ...

, Fu Jow Pai,

Hapkido Hapkido ( , , ), also spelled ''hap ki do'' or ''hapki-do'' is a Korean martial art. It is a hybrid form of self-defense that employs joint locks, grappling, chokeholds, throwing techniques, kicks, punches, and other striking attacks. ...

, Hung Gar,

Jujutsu Jujutsu ( , or ), also known as jiu-jitsu and ju-jitsu (both ), is a Japanese martial art and a system of close combat that can be used in a defensive or offensive manner to kill or subdue one or more weaponless or armed and armored opponent ...

Judo is an unarmed gendai budō, modern Japanese martial art, combat sport, Olympic sport (since 1964), and the most prominent form of jacket wrestling competed internationally.『日本大百科全書』電子版【柔道】(CD-ROM version of Encyc ...

, Sambo,

Ninjutsu , and are terms for the techniques and skills used by spies and scouts in pre-modern Japan known as ninja. Some of these techniques are recorded in ninja scrolls, some which have been published and translated. The study of these scrolls have c ...

Shoot wrestling Shoot wrestling is a Japanese hybrid grappling style and combat sport. Shoot wrestling incorporates techniques from various wrestling, submission grappling, kickboxing and karate styles. It was particularly inspired and influenced by catch ...

, and

mixed martial arts Mixed martial arts (MMA) is a full-contact fighting combat sport, sport based on strike (attack), striking and grappling; incorporating techniques from various combat sports from around the world. In the early 20th century, various inter-s ...

. They are usually practiced in a maximally safe manner, with controlled movements, and releasing the joint lock once it is apparent that it has been effectively applied. In combat sports, joint locks are used as

submission holds A grappling hold, commonly referred to simply as a hold that in Japanese is referred to as ''katame-waza'' ( "grappling technique"), is any specific grappling, wrestling, judo, or other martial art grip that is applied to an opponent. Grappli ...

, and are intended to force the opponent to submit; the lock will be controlled and held until an opponent submits or a referee recognizes the threat of

and intervenes. The types of joint locks allowed in competitions featuring them varies according to the perceived danger in their application.

s are generally considered safer, while

small joint manipulation Small joint manipulation, in grappling, refers to twisting, pulling or bending fingers, toes, wrists and ankles to cause joint locks in the various joints in those appendages. Technique Most small joint manipulation is done on the hands or ...

and spinal locks are banned in nearly all combat sports.

References

*Iverson, Steven. ''Unarmed Combat''. Online excerpt
Atlasbooks
. ''www.atlasbooks.com''. Accessed March 6, 2006. {{martial arts Grappling positions Martial arts techniques ja:アームロック

Types

Usage

See also

References