In that article, KM describes the "correct" drive-hold alignment of a FLW at impact - using Tiger as a role model, but he doesn't explain the biomechanics of the drive-hold action.
He first states that a golfer has to abduct the left arm in the downswing. That's obvious, but he actually states that the left arm must slow down prior to impact. How can that slowing of left arm motion before impact help drive-hold a FLW through impact?
Then, KM states-: "
The left wrist should bow outward towards the target and attempt to hold its strong position." He only describes what should happen at impact - which is the fact that a golfer must maintain (drive-hold) a FLW through impact - but he doesn't explain how a golfer can achieve that goal from a biomechanical perspective. He only states that it must happen, and he doesn't explain how to make it happen.
He then posted this image of Tiger.
KM then stated-: "
The third and most difficult to accomplish is the supination of the left forearm and wrist. Supination is when the left wrist and forearm begin to face up."
In other words, he seemingly believes that left forearm supination only occurs when the left palm and ventral aspect of the left forearm face skywards. That's biomechanically incorrect - because
any counterclockwise rotation of the FLW that is due to a counterclockwise rotation of the left forearm is supination - even if the FLW never rotates to more than vertical between P6.7 and P7.3.
Here is Dustin Johnson's hand release action between P7 and P7.3.
At P7.3 (image 2) DJs FLW is still vertical and not rolled over (like Tiger's where the left palm faces skywards). If a golfer performed that full-roll action between P7 and P7.3, then he would be a roller, and not a DHer like DJ, who keeps the back of his FLW facing the target between P7 and P7.3. KM doesn't discuss this critical phenomenon - of how to
delay any roll motion of the FLW so that it doesn't happen too soon after impact.
KM also stated the following-: "
Supination is the single most difficult thing to do. As Hogan said, the palm of the left hand must rotate to face up through impact. The left hand must also drive through without breaking down and allowing the right hand to take over."
That's incorrect. The left palm must never rotate to face up through impact. It should be near-vertical at impact and remain near-vertical between P7 and P7.3, and it should only roll further after P7.3. Also, the biomechanics of that roll motion that occurs during a post-impact full-roll action is not due to left forearm supination, and it is due to external rotation of the left humerus in the left shoulder socket.
He also stated that the FLW must drive through without breaking down - which is a description of what should happen (a golfer must maintain a FLW/intact LAFW after impact) but he doesn't explain how a golfer should make that happen from a biomechanical perspective. In other words, he again describes what should happen, but he doesn't explain the underlying biomechnaical mechanisms.
In the section on how to achieve Tiger's impact position, KM wrote-: "
So how does AJ get a beautiful, powerful impact position like Tiger? He has to learn the movements in slow motion first.
If he hooks or draws the ball already, he has to focus on the bowing of the wrist at impact while working his body rotation through impact.
If he is fading or slicing the ball, he needs to focus on the supination. Clubface rotation comes from turning the left wrist as if the left hand is going to turn a key in a door lock. The rotation should be counter-clockwise so that the palm faces up. Also, he needs to train himself into supinating early i.e. the movement begins when his hands reaches his right thigh. Waiting too long only results in a weak flip at the ball."
That's nonsensical advice - stating that one should concentrate on bowing the left wrist if one is a hooker and that one should concentrate on supination if one is a slicer
. All golfers (who use a neutral left hand grip) have to supinate their left forearm during the release of PA#3 to get a square clubface by impact and
all golfers need to have a FLW at impact.
KM also gives no advice on how a golfer should get a FLW at impact. I believe that if a golfer has a FLW/intact LAFW throughout the entire backswing-and-downswing, that one doesn't have to "create" a FLW at impact - but KM seems to be oblivious regarding the concept of playing golf with an intact LAFW.
Finally, this is KM's inchoate idea of what is "driving" the FLW through impact when he writes-: "
One last thought for those trying to learn this position. Yes, the hands must be educated. But just as important as learning the hands is that one’s hips and shoulders are driving the hands through impact. Tiger’s left leg snapping straight at impact, hips forcefully clearing/rotating and shoulders moving in synch with extended arms are prime examples of the body actively driving the swing while the hands are delivering the club in the most powerful way."
He doesn't provide any explanation on how any body pivot action contributes to the
drive-hold biomechanical phenomenon that must happen if a golfer maintains an intact LAFW/FLW from P6.9 to P7.3+. His instruction is so vague as to be even less-than-rudimentary - like the vague pieces of advice frequently found in very simplistic golf instructional books/magazines.
Jeff.