PULL not PUSH your punches

[HerbM]

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They key: You must be able to release ALL the contractions in the opposing muscles while throwing the punch, then at the end of the punch extension instantaneously release the muscles powering the punch, and simultaneously contract the opposing muscles for retraction.
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I was wondering if there is a youtube video of a fighter who is very clearly using that method so we can see it in action.

Is this (i.e., my quote portion above) what you mean by "that method"?

If so, there likely isn't going to be any video that will satisfy your curiosity or give you any real help in duplicating it since to the untrained eye a punch delivered with full relaxation (of the unnecessary muscles) will look about the same.

They FEEL different however, and feeling one of those is a big difference.

Since the puncher doesn't "hold back" the punch, nor stop it before opponent or the bag STOPS the punch, ALL of the momentum is transferred into the target.

Usually I demo these for people by using little short punches with very little speed -- just so you can feel the surprising amount of energy that you receive.

There are plenty of Systema videos showing such punches but without feeling them yourself you will be tempted to think that the effects are not real or true.

Try searching YouTube or Google videos for

Sonny Puzikas strike | punch

Or start here:

Sonny is the Systema guy who was one of the Spetsnaz team in the Ultimate Warrior episode against the Green Berets. He is the real deal -- and yes, I have been hit by him (but not very hard.)

Also either Vladimir Vasilieve, Mikhail Ryabko, or Val Riazanov have videos showing these type of hits explicitly.

You CAN (and I do) use this method to throw jabs, crosses, and other classic boxing punches although typically when the Systema people demonstrate the relaxed punch they use the 'weight of the arm' instead of using much speed.

People who spar with me almost always spontaneously comment (at some point) on how "heavy" my punches feel -- not that I am throwing hard or using more force than is appropriate to the sparring level, just that they hit heavy.

This is because I am (mostly) letting THEM stop the punch rather than my arms or the full extension of my joints do the work.

Punches are more efficient using less internal energy and oxygen (i.e. you don't get as tired as fast) and they go out QUICKER with MORE POWER.

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Herb