how much power for a one punck k.o.

[Jiffy]

While there is no proof, the cross is generally accepted by most styles to be the most powerful. This is because of the alignment of the body and the rotation of the hips. It has little to do with arm strength.

On the topic, I have personally punched someone in the jaw. It broke their jaw and knocked them to the ground, but it didn't knock them out. Having said that, it did stop him attacking back cos he was in quite a bit of pain. Maybe that answers your question...

[KamasandSais]

two words: a lot

[Rick_72]

While there is no proof, the cross is generally accepted by most styles to be the most powerful. This is because of the alignment of the body and the rotation of the hips. It has little to do with arm strength.

On the topic, I have personally punched someone in the jaw. It broke their jaw and knocked them to the ground, but it didn't knock them out. Having said that, it did stop him attacking back cos he was in quite a bit of pain. Maybe that answers your question...

Your correct arm strength has nothing to do with it. I've just always felt like I'm generating a lot more power from my uppercut than a cross. With an uppercut, thrown properly, your rotating the hips no different than a cross, but your also lifting you body upward with a tight center of gravity.

[bushido_man96]

Not sure I'm buying that a cross is the most powerful punch. I've never really put that much thought into that, but is there some sort of scientific study done on this? I personally feel that my uppercut is much more powerful than my cross, because the cross basically comes from the outside in and the uppercut is a tight inside, torque driven, punch.

If your cross is coming from the outside, I don't think you are throwing a cross punch. That sounds more like a hook to me. The cross punch should be a straight punch.