A choke or chokehold is a grappling hold used to either restrict the flow of air or blood through the neck, causing the victim to pass out (or die in some cases). Chokeholds are usually more effective than brute-force strangling since they use leverage, either via a figure-four hold or a collar hold. They are often used in martial arts that involve grappling such as Judo or Brazilian Jiu-Jitsu.
An air choke or "true" choke is a type of chokehold that compresses the trachea, blocking the passage of air and causing asphyxia. They are less commonly used since they take more strength to apply, take longer to cause unconsciousness and are more dangerous.
The forearm is pressed against the throat, restricting the flow of air. This choke is banned in many competitions due to the high risk involved.
Blood chokes cause compression of the carotid arteries and/or jugular veins, restricting the flow of the blood to the brain causing strangulation. They are usually preferred over air chokes as they are safer, easier to apply, and can lead to unconsciousness in seconds if applied properly.
Rear naked chokeEdit
One arm (in this case the right) circles the opponent's neck, with the trachea in the crook of the elbow. The right hand grasps the left bicep, with the left hand behind the opponent's head. The elbows are brought together, squeezing the carotid arteries and restricting blood flow to the brain.
One leg (in this case the right) circles behind the opponent's neck, with the right foot being squeezed in the crook of the left knee. The carotid arteries are compressed with the right leg and the opponent's own right shoulder.