[bioengine]

Bioengine,
I cannot speak for V.J. Trolio, but I do not think that
he ever insinuated that he descovered Rooting. Hd did
mention that Rooting was a martial art tecnique. Martial
Arts was in play long before Golf was invented.

I sence that the disagreement is when the center of mass
moves to the left. Your posts appear to indicated that
there is a gradual move to the left from the top of the
backswing. In Hogan's case the complete move was completed
prior to starting the downswing. Trlio did not say that
this was the way that it should or has to be done, but
the way that Hogan did it. A gradual shift of the center
of mass in the downswing followed by a hip turn is very difficult to execute.

Dkerby,
I hadn't elaborated when people start pressing forward occurs.
I didn't agree how he described the shear forces created hip rotational speed. Ground reaction forces create hip rotational torque and supper stiffen. This information wasn't quite right by trolio, he's on the right track although it's important if people are to learn about ground forces the information has to be accurate.

Trolio is selling videos and making money off someone else's research and hard work, this is true. Maybe he's not saying it's his work although they way he promotes his video comes across that way.
This is why I said I hope he has the common decency to give a kick back to the person he got his information from. Sorry if I offended anyone by saying this, although I feel it's just the right thing to do. If someone took one of Yoda's ideas and put it on video and sold it I would say the same thing.

I do agree with Trolio that hogan started pressing forward prior to completing his back swing.Although the move wasn't completed before the downswing started.
Super stiffen or rooting occurs just prior to impact and sustains until impact occurs. This happen so fast you can't see it nor on video can pick this up.
The hips actually counter torque and turn back away from the target a few degrees when you super stiffen . On video you won't see this occur. When the upper body catches up with the hips and impact occurs, the hips and upper body turn through to a full finish together.


People who have good ground forces and lower body mechanics they all start pressing forward prior completion of the backswing.

This is why I have said all along, you can't physically apply ground forces or this move on the practice fairway.
You need to train your body how to create this movement pattern.