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Post by imperfectgolfer on Mar 7, 2012 10:55:44 GMT -5
See this BM-forum thread. www.brianmanzella.com/golfing-discussions/16901-role-right-arm-squaring-face.htmlThe posed question: "What role does the right arm have in squaring the clubface? I'm talking more about right arm straightening rather than wrist rotation." Kevin Shields replied-: "In and of itself the right arm bending and straightening shouldn't have any effect on squaring the face. How could it?" I think that KS is clueless! During the right arm straightening action, the right forearm can pronate or remain neutral. Here is my demonstration of pronation during the right arm straightening phase. If the right forearm pronates during the right arm straightening phase of the downswing, it can predispose to a roller release action where the right hand pronates over the left hand through impact. Here is Louis Oosthuizen pronating his right forearm during the late downswing. Alternatively, the right forearm can remain neutral (and neither pronate or supinate) during the right arm straightening action. Here I am demonstrating the neutral action. Here is David Toms using a neutral right forearm in his right arm straightening action. Jeff.
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Post by gmbtempe on Mar 7, 2012 11:58:25 GMT -5
The posed question: "What role does the right arm have in squaring the clubface? I'm talking more about right arm straightening rather than wrist rotation.
How does the wrist rotate without rotating the forearm?
How does extending the right arm, as in a boxer making a punch, create forearm rotation, sure you can extend and rotate but in and of itself how does that move rotate? You CAN rotate though, your statements and Kevin's seem like apples and oranges.
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Post by imperfectgolfer on Mar 7, 2012 16:58:09 GMT -5
Greg,
Pure right arm elbow straightening is due to a triceps contraction and it cannot rotate the right forearm. However, the right elbow is straightening while the hands are moving targetwards along the hand arc path and there is a lot of internal rotation of the right humerus happening between P6 and P7, and it is not surprising that the right forearm will also have a tendency to pronate unless the golfer uses a technique-effort to prevent that from happening.
By contrast, a boxer straightens the right arm in a straight-line punch motion that is directed straight at the opponent's jaw.
Jeff.
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Post by gmbtempe on Mar 7, 2012 17:23:52 GMT -5
Greg, Pure right arm elbow straightening is due to a triceps contraction and it cannot rotate the right forearm. However, the right elbow is straightening while the hands are moving targetwards along the hand arc path and there is a lot of internal rotation of the right humerus happening between P6 and P7, and it is not surprising that the right forearm will also have a tendency to pronate unless the golfer uses a technique-effort to prevent that from happening. By contrast, a boxer straightens the right arm in a straight-line punch motion that is directed straight at the opponent's jaw. Jeff. Well ya, but I think Kevin was speaking from a pure sense of straightening as I laid out. On an inclined plane the arm is likely going to rotate as it straightens near impact.
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Post by imperfectgolfer on Mar 8, 2012 0:10:54 GMT -5
Greg,
I have no idea why you believe that Kevin was talking about "pure" right arm straightening that is unrelated to what happens in a full golf swing - where the right arm straightens while moving roughly parallel to the inclined plane as the right forearm paddlewheeels into impact.
Jeff.
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