Bio Mechanics

[bioengine]

Bioengine,

I agree that the pivot is very important. Zone 1 is where people should start BUT you cannot feel # 3 PP (clubhead) , trace the plane line (shaft/sweetspot plane) as well as execute one of three hinge actions (club face)on command with the pivot. The pivot does all the heavy lifting the dumb brute if you will. The hands are the command post, and without the science of relationship (Geometry) a golfer will have nothing but a dumb brute pivot with moron mittens! Hell, before reading Chapter five of TGM I did not even know how to grip the club properly. I have played pretty good golf for 20 years now. No amount of physics can teach you to put your hands on the club correctly. I do not think a chasm exists between action and motion, as you seem to suggest. Designating a percentile participation score seems silly.

Okie,
One thing video can't measure is body segments speeds.
Ok there are three thing you need is 6-m-1, conservation of momentum and muscular loading for good physics.
People lose P3 due to arm deceleration as soon as the hands begin to slow down to early in the downswing and the club then is moving faster than the hands and you lose pressure against the shaft. So this is a physics problem not geometry problem.
You have a power leakage somewhere. The arms slow down when you lose conservation of momentum and muscular loading. This could even occurred as early as the from starting from the ground.

Most people pull on the handle and this creates a feeling of P3,
in reality they have poor ball compression and they are adding an external force to the system which is also creating arm deceleration and steering. They pull on the handle to stop an early release cause their arms are decelerating. So it boils down to again poor physics and a power leakage somewhere.

Ok if you have a good grip ,flat left wrist will happen naturally is you have good physics.When you arm sits natural down by your side your hand naturally is flat.

You can believe what you like that's fine, although when you understand how the body moves naturally you will soon understand you can achieve flat left wrist with good physics. If your setup is right and grip is right, good physics you will achieve flat left wrist.

Every athlete I have worked with say to me and they achieve good physics they can feel P1,P2,P3 and P4. Pressure aren't applied they are created and felt from good physics.

Your entitled to your beliefs thats fine, there your beliefs.
Although I have no beliefs or opinions this is what 20 years of measuring 10's of thousands of golf swing tell us. using laws of physics and newtons law and body physics.