
One of the more notorious training routines of judo (back in the day) was to purposely strangle someone to unconsciousness. This was partly done to teach the judoka how to revive the unconscious. It was also done to educate (to not get oneself in a position to be strangled, I suppose).
“Then it was my turn to strangle my partner out but he was one of the fighters. Even as I was putting my hands in place for the kata-hajime strangle, he tensed his neck, preventing me from taking the full position. So, I softly started again, and then locked it on hard and quickly. Immediately he grabbed my hands and tried to tear them away from his throat, but the strangle was on securely. He began to flail around gagging and choking. At one point he arched violently
Hoare went on to explain that his Judo club in London employed this training until the end of the 1960s. He said that the Los Angeles Police Department too had used this particular strangle hold to immobilize people – a technique they called “The Sleeper”.
