A properly applied blood choke causes unconsciousness in approximately 3 to 10 seconds. A tight, well-positioned rear naked choke can put someone out in as little as 3 to 5 seconds. Even a sloppy choke will get there in 10 to 15 seconds. Published research puts the average across all choke types at around 8.9 seconds.
Why so fast? A blood choke compresses the carotid arteries on both sides of the neck, cutting off blood supply to the brain. No blood means no oxygen. The brain shuts down. This is fundamentally different from an air choke, which targets the trachea and windpipe -- those take 30 seconds or longer and cause significantly more damage. Blood chokes are faster AND safer. That's why every reputable grappling system teaches blood chokes, not air chokes.
Here's the part most people don't talk about enough: knowing when to let go.
When someone goes unconscious from a choke, they may experience what's called a clonic seizure -- their body cramps and twitches. Looks alarming, but it's a normal neurological response. They'll typically wake up within 10 to 30 seconds after the choke is released.
But if you hold it too long, you're in dangerous territory. Brain damage can begin within minutes of sustained compression. People have died from chokes held beyond the point of unconsciousness. I learned this the hard way as a bouncer -- held a choke for 20, 30 seconds because someone told me it takes that long. The guy finally came around, but those seconds where he wasn't waking up were the longest of my life.
So here's the rule: monitor their consciousness. You'll feel the resistance fade, then the body goes limp. That's your signal to release. Don't hold it a second longer than you have to.
Train these techniques with progressive resistance under qualified instruction. And always, always know when to let go.
For the complete rear naked choke mechanics, back control, and finishing details, see our full rear naked choke guide. The entire choking system is available in the How To Win A Street Fight bundle.