Jamie Sadlowski's vist to TWU

[Brian Manzella]

It is literally amazing how some folks in internet land can't even understand the question.

That's what happens when folks are blinded by their own "material."

Meanwhile, on the this thread, a poster got the answer more or less dead on correct.

This person learns from two if the best teachers on the planet and is 20 shots a round better than when we started with him.

He has attended seminars and is always learning.

1st prize Ed. !!!

 

[rogue]

It is literally amazing how some folks in internet land can't even understand the question.

That's what happens when folks are blinded by their own "material."

Meanwhile, on the this thread, a poster got the answer more or less dead on correct.

This person learns from two if the best teachers on the planet and is 20 shots a round better than when we started with him.

He has attended seminars and is always learning.

1st prize Ed. !!!

Wow, I won the 1st prize. I am so proud.
I thought I was on the right track, but I don't like to opine, because I'm merely a avid golfer.

Your'e right, I've learned from the two best teachers on the planet. And I am so honored that they accepted me as a student. Not only are the the best teachers on the planet, they are great guys too.

I'll tell you how I deduced the answer...

First was the awesome pictures that Brian Manzella made to explain the ideas and concepts, Kwon-Como-Rory jpg and Kwon-Como-Donald jpg. Also the excellent video's Brian produced on Wise Guys.com

Then, the ground breaking video Michael Jacobs made on ground reaction forces

Lastly, I recalled the ESPN video.

 

[Brian Manzella]

The cop jump decels the forward rotation and the axis tilting.

 

[Brian Manzella]

What is funny is how easy this was for Ed.

If the Center of Pressure has to be forward of the Center of Mass to create rotation on a axis, and someone has their Point of Origin (another term for the COP because it IS the point of origin for the combined ground reaction force vector) forward of the COM and are creating toward the target rotation and "axis tilting," and the left foot loses contact with the ground and the right foot is now the Point of Origin and the vector is now BEHIND the COM, is works to slow and eventually stop those rotations.

And no matter what the argument is about it, that is the scientific fact.

Next subject.

 

[Frans@France]

Jamie's combined center of pressure is, by mid downswing, like every other good player, very leftward in his stance. But just below parallel to the ground of the shaft—pre-impact—that combined center of pressure moves rapidly over to his right foot.

This new point of origin for the combined ground reaction force vector (also the COP) allows him to do WHAT to himself pre-impact, impact and just past....?

1) why using the word "combined" ? that "combined" cop is which cop's combined?
2) same question for the "combined ground reaction force vector"

The cop jump decels the forward rotation and the axis tilting.

1) why would we care about the cop jump as that is only a effect and not a standalone action. Seems impossible to tell someone to jump his cop towards his right foot. So the cop "jump" has an origin. What is that origin?

If the Center of Pressure has to be forward of the Center of Mass to create rotation on a axis, and someone has their Point of Origin (another term for the COP because it IS the point of origin for the combined ground reaction force vector) forward of the COM and are creating toward the target rotation and "axis tilting," and the left foot loses contact with the ground and the right foot is now the Point of Origin and the vector is now BEHIND the COM, is works to slow and eventually stop those rotations.

And no matter what the argument is about it, that is the scientific fact.

 

[wulsy]

If it's not left it has to be right, right?

If the left foot leaves the ground it can't be the cop anymore so the cop must be right now. Is it really that simple?

 

[cnadon]

Does this shift of the cop to the back account for what one sees with Bubba Watson's front foot after impact?

 

[Brian Manzella]

<iframe src="//player.vimeo.com/video/97024698" width="749" height="562" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>

You can still get the COMBINED Ground Reaction Force vector to point to the rear side of the COM to decal the rotation—in fact that's how most do it.

But if you can completely unwiegh your left foot—SLAM< a huge quick change in the rotation.

 

[Frans@France]

1) why using the word "combined" ? that "combined" cop is which cop's combined?
2) same question for the "combined ground reaction force vector"

I think I found the answer : There is no combined cop unless the cop is measures using two force plates where one foot is on one plate and the other on another plate. Both plates will register a COP, using those two COP and two GRF it's possible to calculate the COP(net)

 

[wulsy]

Are you talking about slowing down the rotation around the horizontal axis? Or both axes?

 

[spktho]

I think I found the answer : There is no combined cop unless the cop is measures using two force plates where one foot is on one plate and the other on another plate. Both plates will register a COP, using those two COP and two GRF it's possible to calculate the COP(net)

Why can't the cop be measured on one force plate? Most golfers use both feet in a golf swing and each foot produces it's own cop reacting with the ground and to what is happening in the body, arms and club. The cop like shown with a Swing Catalyst type device seems to be showing one cop point utilizing the data gathered from each foot's cop during the swing. Hence, what I presume is meant by, combined.

From your first sentence, it seems you may be thinking about com or weight shift? cop and com are two different things.


I think an important question may be is when looking at the recommended cop percentages that show approximately 80% front foot and 20% back foot at impact for most high level golfers; what are Sadlowski's and other high swing speed guys who get off their front at or near impact numbers at impact? and would it be beneficial for us normal guys (not saying to teach jumping off our front foot) to try to push our cop more 'back' near impact to help control rotation more?

 

[tongzilla]

Unweighting that left foot will make it much easier to hit up also.

 

[tongzilla]

Maybe using the combined ground reaction vectors to rotate the Center of mass is the secret to creating all the necessary deceleration of the body without having the intention to do so (ie you can just attempt to accelerate through the ball like pop instruction teaches).