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Post by imperfectgolfer on Nov 24, 2011 21:01:07 GMT -5
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Post by imperfectgolfer on Nov 24, 2011 21:46:15 GMT -5
That upline video of Dustin Johnson's swing is fantastic because it really shows what happens in swingers between P6 and P8 in an incontestable manner. Here is the P6 to P7 sequence. Image 1 is the P6 position. DJ's FLW is parallel to the ball-target line. He still has at least ~90 degree of clubshaft lag. Image 2 is at the P6.5 position. He has lost most of his lag due to the release of PA#2. Note that the clubshaft is releasing within the plane of his LAFW. Image 3 show him at the P6.9 position. Note that he has squared the clubface to the clubhead arc by releasing PA#3 (biomechanically due to a left forearm supinatory motion + some external rotation of his left humerus). Image 4 shows him at the P7 position. His FLW, and therefore clubface, is facing the target. Here is the P7 to P8 sequence. Image 1 show him at the P7 position. His FLW, and therefore clubface, is facing the target. Image 2 shows him at the P7.1/7.2 position. His FLW, and therefore clubface, still face the target because he has not yet started to perform a full roll hand release action. Image 3 shows him at the P7.4 position. He has started to roll fis FLW and intact LAFW. Image 4 shows him at the P7.6 position. He is rolling his FLW/intact LAFW counterclockwise. Image 5 shows him at the P8 position. He still has a FLW and intact LAFW. Note that he never flip-bends his left wrist between P7 and P8, and the clubshaft never passes his FLW/left arm (from a rotational perspective). Jeff.
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Post by imperfectgolfer on Nov 24, 2011 22:21:29 GMT -5
One of great advantages of performing a full roll hand release action with an intact LAFW/FLW is that it allows one to keep the clubface facing the target through impact - until about P7.1/7.2. The yellow colored area represents the immediate impact zone - between P6.9 to P7.2. That's the zone where the clubface should optimally continue to face the target before becoming closed. Check David Toms' sequence. picasaweb.google.com/Lukman.Ahmed/DavidToms?authkey=Gv1sRgCPG4wfvih5uCEQ#slideshow/5678338896793285970Note that his clubface still faces the target in the two images after impact. Jeff.
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Post by imperfectgolfer on Dec 2, 2011 13:34:25 GMT -5
Consider this 3jack thread. richie3jack.proboards.com/index.cgi?board=general&action=display&thread=2939&page=53jack stated-: "Now, the post-impact stuff is a different story. I prefer talking about it in terms of the 'over-taking rate' as well as things like a 'crossover (of the arms)' release. Here's where I agree, if it's well-timed...then there's nothing really wrong with it per say. Although I question how much force the ball will be struck with. But, I think for the mere mortals playing golf...that high overtaking rate or 'post impact-flip' can be difficult to time and cause one to struggle with clubface and low point control." Jeffy stated-: "Sorry for the confusion. Luke is a "roller", not a flipper. Rolling is even less stable than flipping, and "flip/rolling" is the worst: military golf." I think that they are both wrong - because they don't understand that there is a transition zone between P6.9 and P7.2 where the clubface doesn't roll and where the clubface continues to face the target. Luke Donald has that transition zone (yellow zone) inbuilt into his swing action - a point that neither 3jack or Jeffy understands. Jeff.
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