How to Knock Someone Out with One Punch

It is actually not as hard as many people think to knock someone out with one punch. Watching a boxing match, mixed martial arts fight, or other combat sports you can get the impression that a knockout punch is something very difficult to get right. But in real life, in a street confrontation with no gloves and fighting against someone who is probably not trained to take a punch, getting a k.o. is much, much easier.

If you want to learn how to knock someone out with one punch the first thing you have to do is to think about what it actually is which causes the loss of consciousness. Some types of punch can be very effective at hurting your opponent, opening up cuts on their face or breaking their nose, but may still have little or no chance of knocking them out.

When a person gets knocked unconscious by a punch it is not the immediate force of the impact which does this, but rather the force of the brain being rattled against the inside of the skull.

This means that a punch which causes the head to jerk and move rapidly will be much more likely to knock someone out than a punch which causes less movement of the head, even if it is not as hard. It also means that speed is paramount. A very fast strike with just enough power to move the head will be more likely to knock someone out than a slower punch which has more power and weight behind it.

The need to create this movement of the head is the reason why you are more likely to knock someone out with a punch which they don't see coming. If you see a punch coming towards you you will tense your neck muscles and brace yourself against the impact, reducing the movement of your head when the punch lands. If your neck muscles are relaxed when a punch hits you then you will almost always get knocked out, whatever kind of punch it is.