Post by imperfectgolfer on Sept 8, 2013 13:34:12 GMT -5
Jeffy has stated that he believes that the concept of swinging versus hitting, and the concept of left arm swinging versus right arm swinging are fantasy concepts that don't exist in real life. I obviously believe that he is wrong, and I think that understanding the biomechanical differences between left arm swingers versus right arm swingers explains why certain biomechanical events are happening in certain golfers.
Consider KM's/Jeffy's interpretation of Lee Westwood's hand release action through impact. They label LW a flipper (pro flipper subtype). Why? They notice that LW's left wrist becomes more dorsiflexed after impact and they therefore label that a flipping action.
Here are capture images of LW through impact.
Image 3 shows LW at impact - note that his hands are ahead of the clubhead so he cannot be flipping. Image 4 shows LW post-impact (P7.1) with a greater degree of left wrist dorsiflexion, and they therefore diagnose flipping. However, their definition should only apply to a left arm swinger and not a right arm swinger who chicken-wings through impact (like LW). Note that LW keeps his left arm internally rotated and his left forearm neutral (non-supinated) between P7 and P7.1, and therefore any forward movement of the club must dorsiflex his left wrist. However, if your reference point is that dotted red line then you will note that he is not flipping passed that dotted red line in either image 3 or 4. He has forward shaft lean in image 3 so he cannot be flipping. In image 4 he has the equivalent of an intact LAFW (non-flipping scenario) at P7.1 - red dotted line and clubshaft are in a straight line relationship.
Consider a "pure" right arm swinger.
How would one diagnose flipping in his swing action? Pre-impact, or through-impact, flipping could be diagnosed if he had backward shaft lean. However, how do you diagnose post-impact flipping (pro-flipping) in a "pure" right arm swinger? It is obviously not possible - because there is none of the usual reference points (left wrist, left forearm) that are used to diagnose pro-flipping in a left arm swinger.
Consider my right arm swinging action demo - using a short (child-sized) iron.
The function of the string between the grip and the left shoulder is to create an imaginary straight left arm scenario that allows the hand swing radius to remain constant (relative to the left shoulder socket).
Consider my impact situation.
Note that there are two blurred images in image 1 due to the fact I was using cheap camcorder that only operates at 30 frames/second. I have divided that image 1 into an impact (image 2) and immediate post-impact (image 3) image.
In image 2 I have forward shaft lean so I cannot be flipping. In image 3 the clubshaft and string are in a straight line relationship, which is equivalent to an intact LAFW which means that I am not flipping.
My scenario is identical to LW's scenario. If you ignore LW's left arm (which has chicken-winged through impact) and use an imaginary string (imaginary straight left arm = red dotted line) as your reference point, then you will note that he is not flipping.
KM/Jeffy are oblivious of this distinction because they do not understand the biomechanics of right arm swinging.
Consider LW's downswing action.
Note how he uses early right humerus internal rotation, which KM/Jeffy wrongly believe is the cause of his pro-flipping. However, that's a nonsensical cause-and-effect theory, because LW is using a right arm punch elbow motion (right 'side-arm' throw action) swing technique, which is characteristic of right arm swingers, and that swing technqiue actually requires early rotation of the right humerus. Note that LW has the characteristic alignments at impact for a right arm swinger - i) right humerus internal rotation; ii) incompletely straightened right elbow; iii) neutral right forearm and iv) variably bent right wrist.
If one understands the biomechanics of right arm swinging and if one studied LW's right hand/clubshaft motion through impact, then one would never incorrectly label LW a pro-flipper.
Jeff.
Consider KM's/Jeffy's interpretation of Lee Westwood's hand release action through impact. They label LW a flipper (pro flipper subtype). Why? They notice that LW's left wrist becomes more dorsiflexed after impact and they therefore label that a flipping action.
Here are capture images of LW through impact.
Image 3 shows LW at impact - note that his hands are ahead of the clubhead so he cannot be flipping. Image 4 shows LW post-impact (P7.1) with a greater degree of left wrist dorsiflexion, and they therefore diagnose flipping. However, their definition should only apply to a left arm swinger and not a right arm swinger who chicken-wings through impact (like LW). Note that LW keeps his left arm internally rotated and his left forearm neutral (non-supinated) between P7 and P7.1, and therefore any forward movement of the club must dorsiflex his left wrist. However, if your reference point is that dotted red line then you will note that he is not flipping passed that dotted red line in either image 3 or 4. He has forward shaft lean in image 3 so he cannot be flipping. In image 4 he has the equivalent of an intact LAFW (non-flipping scenario) at P7.1 - red dotted line and clubshaft are in a straight line relationship.
Consider a "pure" right arm swinger.
How would one diagnose flipping in his swing action? Pre-impact, or through-impact, flipping could be diagnosed if he had backward shaft lean. However, how do you diagnose post-impact flipping (pro-flipping) in a "pure" right arm swinger? It is obviously not possible - because there is none of the usual reference points (left wrist, left forearm) that are used to diagnose pro-flipping in a left arm swinger.
Consider my right arm swinging action demo - using a short (child-sized) iron.
The function of the string between the grip and the left shoulder is to create an imaginary straight left arm scenario that allows the hand swing radius to remain constant (relative to the left shoulder socket).
Consider my impact situation.
Note that there are two blurred images in image 1 due to the fact I was using cheap camcorder that only operates at 30 frames/second. I have divided that image 1 into an impact (image 2) and immediate post-impact (image 3) image.
In image 2 I have forward shaft lean so I cannot be flipping. In image 3 the clubshaft and string are in a straight line relationship, which is equivalent to an intact LAFW which means that I am not flipping.
My scenario is identical to LW's scenario. If you ignore LW's left arm (which has chicken-winged through impact) and use an imaginary string (imaginary straight left arm = red dotted line) as your reference point, then you will note that he is not flipping.
KM/Jeffy are oblivious of this distinction because they do not understand the biomechanics of right arm swinging.
Consider LW's downswing action.
Note how he uses early right humerus internal rotation, which KM/Jeffy wrongly believe is the cause of his pro-flipping. However, that's a nonsensical cause-and-effect theory, because LW is using a right arm punch elbow motion (right 'side-arm' throw action) swing technique, which is characteristic of right arm swingers, and that swing technqiue actually requires early rotation of the right humerus. Note that LW has the characteristic alignments at impact for a right arm swinger - i) right humerus internal rotation; ii) incompletely straightened right elbow; iii) neutral right forearm and iv) variably bent right wrist.
If one understands the biomechanics of right arm swinging and if one studied LW's right hand/clubshaft motion through impact, then one would never incorrectly label LW a pro-flipper.
Jeff.
