Yoda - you wrote-: "All he asked was that golfers understand the necessity of a fixed point at the top of the Pivot (Pivot Center / The Glossary). He recommended the Head but did not mandate it (2-H). In fact, he offered an alternative, i.e., the "point between the shoulders" (Stationary Head / The Glossary)."
I don't need to draw lines on those photos for forum members to mentally picture the location of the upper swing center. It is defined as a point midway between the shoulders - which is roughly a point within the chest cavity a few inches in front of T2 vertebra. That point is about 2mm south-east of the C7 blue dot in those photos.
Jeff.
Just draw the lines, Jeff.
You've made this a big deal, and it is a big deal. You've been drawing lines for some 90 posts in this thread, and I've studied and appreciated every one. Don't wimp out now . . .
I have lost confidence in my ability to accurately locate the upper swing center.
I can see the right shoulder. Now, I have to mentally "picture" where the left shoulder is located - which depends on the degree of shoulder rotation and the angle of the shoulder turn relative to the ground. I cannot clearly "picture" where the left shoulder is located in this birds-eye view where the upper torso is so spiraled. Can you offer any advice?
I have lost confidence in my ability to accurately locate the upper swing center.
I can see the right shoulder. Now, I have to mentally "picture" where the left shoulder is located - which depends on the degree of shoulder rotation and the angle of the shoulder turn relative to the ground. I cannot clearly "picture" where the left shoulder is located in this birds-eye view where the upper torso is so spiraled. Can you offer any advice?
Jeff,
I truly value your visual and textual additions to LBG. Thanks once again for your insights!
On this assignment -- thank you for your indulgence -- I gave you an explicit directive:
Draw a vertical line between either of Homer Kelley's recommended Pivot Centers, i.e., the Turned Head or the 'Point between the shoulders', and the ground. Take your choice . . . there's only a fraction of difference between the two (if that).
In other words, the pressure's off: I'm not looking for an assessment of your nouveau "Upper Swing Center" or its relation to the Left Shoulder's Rotation or the Spine's Spiral.
[Great stuff for a new thread, though. Have at it! BTW, with all due respect to your term "Upper Swing Center", Homer's term Pivot Center works better for me. There can be only ONE Central Axis in a Centered motion. Your term implies there are (at least) two: An Upper and a Lower. Now, that may well be your model (if so, please address that, too.]
For now . . .
Please just draw a vertical line between your preferred 'Homer Center' and the ground. Personally, since you've asked my advice, I'd start with a vertical line touching the left side of the Turned Head.
Yoda - here is a revised image with red lines drawn alongside the left side of the turned head.
I started to use the term lower swing center after reading the Golf Digest S&T article, where Bennett/Plummer used the term to indicate a point midway between the hip joints.
Yoda - here is a revised image with red lines drawn alongside the left side of the turned head.
Thanks for this work, Jeff.
Homer Kelley and his advocates (including me) have taken a lot of heat in some quarters for his teaching that the "true Swing Center ... is around a Hinge Pin ... precisely between the feet" (2-H / 7th edition). Your work provides ample proof that he was right . . .
It appears to me that Player is off plane at the top with a bent left wrist.
Palmer arched left wrist. Nicklaus and Souchak flat left wrists. What do others see?
I moved this post to another thread, "Clubshaft Alignment at the top".
Last edited by mb6606 : 12-14-2008 at 12:11 PM.
Reason: Moved thread
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