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Post by imperfectgolfer on Jan 20, 2010 15:45:17 GMT -5
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Post by gmbtempe on Jan 20, 2010 15:51:19 GMT -5
Is he telling us to stall intentionally or that the natural motion of a correctly sequenced swing is going to allow the kinetic chain action to occur to its maximum ? I think that is what he is saying, no one would intentional stall would they, thats not how I think when swinging or have never heard that stated.
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Post by imperfectgolfer on Jan 20, 2010 18:47:05 GMT -5
I do not believe that Dariusz is stating that the left shoulder must stop moving when it reaches that red line. I think that he is implying that it stalls naturally when it reaches the red line - in the sense that the left shoulder stops moving linearly towards the target, and instead moves up-and-inside (leftwards). My disagreement with his idea is that I believe that the release of PA#4 is related to stalling of the upper torso rotation, and not primarily the left shoulder rotation. I think that the upper torso's rotation stalls earlier - at the start of the mid-downswing and that's when PA#4 starts to release in a pivot-activated swinger's swing action. See Ben Hogan's PA#4 release action. www.youtube.com/watch?v=CWbppUcInrsPA#4 can be deemed to be in the process of starting its release when the distance between the hands and right shoulder starts to increase, and it occurs well before the left shoulder reaches the red line (that Darius drew vertically at ball position). I also think that no energy is transferred from the rotating torso to the swinging arms according to the principles of the kinetic link theory (where a "fixed" amount of energy is transferred from one body part to another body part when the first part slows down). I think that the mechanical explanation is much more simple - based on simple lever mechanics. I also think that one needs to understand that the left arm is catapulted down-and-forwards in the direction of the ball, while the upper torso rotates along a different axis - therefore one needs to only consider/calculate the amount of torso rotational energy that has a vector-component that is directed in the direction of the ball, and not the amount of torso energy that directs the torso to continue to rotate inside-left. Jeff. |
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Post by nyclagster on Jan 24, 2010 0:31:22 GMT -5
Jeff, I somewhat agree with the fact that the left shoulder goes up, left and back. And I disagree with your notion of the #4 accumulator blasting off the chest. Not that it doesn't happen, just that it is not the most efficient use of that particular accumulator. I will at some point make a post with a video explanation of my point of view.
Ralph
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Post by imperfectgolfer on Jan 30, 2010 20:32:11 GMT -5
nyc lagster
I look forward to your alternative explanation.
I hope you realize that I believe that PA#4 release only involves the movement of the left arm downwards, and not outwards - when I refer to the idea of the pivot action blasting the left arm into orbit. When the distance between the hands and right shoulder increases (representing the release of PA#4) it doesn't mean that the upper left arm loses its close connection to the upper chest wall. If a golfer pivots optimally through the impact zone, then the left arm should still remain in close contact with the upper chest wall through impact/followthrough - even though PA#4 has been efficiently released.
Jeff.
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