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Post by imperfectgolfer on Feb 21, 2019 16:35:15 GMT -5
I have written a review paper where I review the opinions expressed by the presenters (Sasho MacKenzie, Joe Mayo and Michael Finney) at Michael Finney's Golf Swing Kinetics Seminar. See - perfectgolfswingreview.net/finneykinetics.htmlI disagree with some of their opinions, and I have provided my website's readers with an alternative way of thinking about optimum golf swing kinetics and kinematics. Jeff.
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Post by dubiousgolfer on Feb 24, 2019 17:11:36 GMT -5
Dr Mann
You've mentioned the following:
---------------------------------------------------- " If you believe that the only forces causing a counterclockwise rotation of the pelvis during the hip-squaring phase of Henrik Stenson's and Adam Scott's golf swing action between P4 and P5 are due to GRMs, and if you believe that they are not using their right-sided lateral pelvic rotator muscles working in concert with a "stabilised" right leg situation, then how would you explain why their right buttock remains abutted against the tush line, while their left buttock gets rotated back towards the tush line (like a door closing about the axis of an imaginary door hinge axis that is located near the right hip joint), during their hip-squaring phase? If you, as a reader of this review paper, can present me with a reasonably credible explanation, then I will gladly post your explanation in my Page of Addendums."
"Sasho then states, based on his experience, that many golfers are better at pushing away from the ball-target line with the right foot at the start of the downswing (which will move the right side of the pelvis forwards in the direction of the ball-target line) and less effective at pushing in the opposite direction with the left foot (which will move the left side of the pelvis backwards away from the ball-target line)"
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If I played 'devils advocate' could the reason why the right buttock leans against the tush line be explained by the 'reverse' of Sasho's statement above? That many golfers who can keep their right buttock on the tush line are more effective pushing with the left foot than the right foot?
Also I've noticed that you have not mentioned 'The Ryke Effect' in topic number 5 . Does that mean you no longer believe there is such a phenomenon that can be used to help square the clubface?
DB
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Post by imperfectgolfer on Feb 24, 2019 18:19:51 GMT -5
Dr Mann You've mentioned the following: ---------------------------------------------------- " If you believe that the only forces causing a counterclockwise rotation of the pelvis during the hip-squaring phase of Henrik Stenson's and Adam Scott's golf swing action between P4 and P5 are due to GRMs, and if you believe that they are not using their right-sided lateral pelvic rotator muscles working in concert with a "stabilised" right leg situation, then how would you explain why their right buttock remains abutted against the tush line, while their left buttock gets rotated back towards the tush line (like a door closing about the axis of an imaginary door hinge axis that is located near the right hip joint), during their hip-squaring phase? If you, as a reader of this review paper, can present me with a reasonably credible explanation, then I will gladly post your explanation in my Page of Addendums." "Sasho then states, based on his experience, that many golfers are better at pushing away from the ball-target line with the right foot at the start of the downswing (which will move the right side of the pelvis forwards in the direction of the ball-target line) and less effective at pushing in the opposite direction with the left foot (which will move the left side of the pelvis backwards away from the ball-target line)" --------------------------------- If I played 'devils advocate' could the reason why the right buttock leans against the tush line be explained by the 'reverse' of Sasho's statement above? That many golfers who can keep their right buttock on the tush line are more effective pushing with the left foot than the right foot? Also I've noticed that you have not mentioned 'The Ryke Effect' in topic number 5 . Does that mean you no longer believe there is such a phenomenon that can be used to help square the clubface? DB I do not understand how one can push only with the left foot between P4 and P4.5 to induce the left buttock to move towards the tush line when the left foot is barely pressure-loaded at the start of the downswing with only 20-30% of the COP measurement under the left forefoot. However, I could imagine a scenario where increasing COP under the left forefoot, that is being directed in a push-manner towards the toes, can help to synergistically induce the left buttock to move back towards the tush line when the right-sided lateral pelvic rotator muscles have already started to induce a counterclockwise rotation of the pelvis. I arbitrarily decided to not discuss the RYKE effect because I have no real idea whether it plays any significant role and because I thought that it would make the topic far more complicated for readers who have never previously studied my review papers. Jeff.
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Post by imperfectgolfer on Feb 25, 2019 11:59:42 GMT -5
DB,
I increasingly like your "idea" of generating a horizontal GRM under the left foot to move the left buttock towards the tush line - so I have modified a paragraph in my review paper to include your suggestion.
Here is my modified paragraph-:
"The key point that a golfer needs to understand if he wants to use the active muscular technique of inducing a counterclockwise pelvic rotation between P4 and P5 (by using the 6 right-sided lateral pelvic rotator muscles) is that he needs to keep his right buttocks abutted against the tush line during that early downswing time period. He must specifically not attempt to generate any horizontal GRM (pivoting GRM) under the right foot by pushing away from the ball-target line using horizontal ground reaction forces being exerted under the right foot - as recommended by Dr. Kwon and Sasho - because that would likely induce a premature motion of the right buttocks away from the tush line. Any pressure being exerted under the right foot must be directed straight down vertically into the ground and a golfer must avoid pushing backwards away from the ball-target line (which can induce a right hip spinning motion), or pushing sideways in a direction that is away from the target (which can induce a pelvic slide motion in a targetwards direction). However, it is perfectly permissible to simultaneously generate a horizontal GRM (pivoting GRM) under the left forefoot during the hip-squaring phase between P4 and P5 by pushing towards the toes (toward the ball-target line) and that horizontal GRM being generated under the left forefoot can synergistically help to move the left buttock back toward the tush line (while the right buttock remains in close contact with the tush line).
Jeff.
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Post by dubiousgolfer on Feb 25, 2019 17:46:19 GMT -5
Dr Mann - the modification does seem to make logical sense from both an anatomical and physics perspective
DB
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Post by imperfectgolfer on Feb 25, 2019 22:22:50 GMT -5
Dr Mann - the modification does seem to make logical sense from both an anatomical and physics perspective DB I wish that there were more forum members like you around here who could provide me with useful "ideas" to improve our understanding of the full golf swing action as performed by professional PGA tour golfers. Jeff.
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