Can a sleeper hold kill you?

A sleeper hold, also known as a chokehold or a stranglehold, is a grappling hold that involves applying pressure to the opponent's carotid arteries, which supply blood to the brain. When properly applied, a sleeper hold can cause the opponent to lose consciousness within seconds by cutting off the blood flow to the brain. If the hold is not released promptly, it can lead to serious injury or even death.

The most common type of sleeper hold is the rear naked choke, which is applied from behind the opponent's head. Other variations include the front choke, the guillotine choke, and the triangle choke. Sleeper holds are often used in mixed martial arts (MMA), Brazilian jiu-jitsu (BJJ), and other combat sports as a means of subduing an opponent.

While sleeper holds can be dangerous, they are not always fatal. If the hold is released quickly, the opponent will usually regain consciousness without any lasting effects. However, if the hold is maintained for too long, it can cause brain damage or even death.

In 2015, a 26-year-old man died after being placed in a sleeper hold during a mixed martial arts fight in Japan. The fighter, Shoji Nishimura, was knocked unconscious by the hold and never regained consciousness. He died two days later from a brain injury.

This incident highlights the importance of proper training and safety precautions when using sleeper holds. Instructors and coaches should teach their students how to apply and release sleeper holds safely, and they should always be present to supervise training sessions.