Here’s what I saw when I went looking for Brooks Koepka’s 6 mph decrease in club head velocity between 18″ pre-impact to impact, and it should be plain to see for anyone who analyzes motion.
I’ve said before, been saying for years, actually, that when you squat into the address you will restrict hip turn, and when you restrict hip turn on the back swing, your hips will reach impact position before the upper body.
This will essentially jam you coming into impact and you’ll have to do strange things to keep the swing going.
Well, I have seen a swing analysis on Youtube where Koepka’s swing coach is pointing out Brook’s squatting address and deliberate restricting of the hips on the back pivot (to build torque power, in Modern Golf Swing’s eyes), and you’ll see what the result is in the area between the “3 O’Clock” position (where the club shaft reaches parallel coming down from the top) and impact.
As you can plainly see, B.K. is squatting pretty well into the address, very much like Jason Day, another squatting-address swinger (who has significant back issues at 30), and you’ll see very restricted hip action on the back pivot, which is the reason for this setup.
I’ll just let you see the swing itself below without interruption, and pay close attention to Brooks’ body as he passes the “3 O’Clock” position and comes into impact:
Everything seems to be going great on the transition into the down swing, but of course, because Brooks’ hips don’t turn as far as they should, leading to the lower back twisting and separation of the upper and lower body as one unit, the hips return and reach impact position long before the club reaches impact.
This is the “jamming,” and you’ll see B.K. reacting to that and literally standing on his toes to keep the swing and club going into and through impact:
You see that Brooks’ right elbow is jammed into his side and literally stuck until he can get his right hip out of the way so he can continue through and extend into the ball.
If the swing analysis machine they were using on Masters weekend is correct, and Brooks was losing 6 mph from pre-impact into impact, there is your cause and effect right there.
It’s not the mechanics of the down swing, but rather the address position, the restricting of the hips on the back pivot, and all the problems that come into play swinging in this manner.
Would I be shocked to hear that there’s a 6 mph loss of speed into the ball? Looking at what I see above, absolutely not.
And for Peter Kostis to imply on television as he did on Saturday that this is something completely natural and that it will occur to everyone swinging a club would be laughable if these Modern Golf Swing proponents weren’t wrecking bodies and backs left and right with their junk science.
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