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Post by imperfectgolfer on Mar 10, 2013 10:02:45 GMT -5
See this thread started by Miles in the jeffy-forum. jeffygolf.com/showthread.php?652-The-Feel-of-Lateral-Bend-and-LordosisHe is trying to demonstrate the "feel" of lateral bend and lordosis using a DTL capture image of Tiger Woods. What does that red line represent? If it represents the spine, does he really believe that a golfer should acquire a lordotic curvature of the thoracic spine? What does that yellow arrow at the bottom represent? If it represents a pulling force working in an upwards direction, why should it occur? I am really not surprised that readers of KM's article on the topic can come up such a crazy personal interpretation! Jeff.
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Post by imperfectgolfer on Mar 11, 2013 9:15:14 GMT -5
Matt posted this photo of Dustin Johnson in the jeffy-forum thread He then stated-: " Then hands are near their apex. While they continue to rise up (and go rear) with shoulders continuing to rotate, DJ starts to "sit down" and rotates his pelvis.
While he's opening his left side at the target, the arms and the upper torso are doing nothing. No movement! just resisting.
And thus the sensation of 'combining both lordosis and lateral bend' appears in his back." I think that's nonsensical. Lateral bend only occurs later in the downswing - if the thoracic spine bends laterally away from the target. That side-arching of the spine causes the right-side of the torso to become more concave-appearing and that is what KM incorrectly refers to as "lordosis". It is incorrect because the word "lordosis" only refers to concavity of the lower spine in the sagittal plane, and it doesn't refer to the lateral side of the torso. Here is the Merriam-Webster definition of lordosis-: " abnormally increased inward curvature of the lower region of the spine resulting in a concave back as viewed from the side." Matt is seemingly inferring that lordosis refers to the left-side of the torso, which is even a greater perversion of KM's wrongheaded opinion. Jeff.
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Post by tomdavis76 on Mar 11, 2013 21:40:31 GMT -5
clueless
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Post by imperfectgolfer on Mar 11, 2013 22:47:45 GMT -5
I am not surprised that you state that you are clueless!
Jeff.
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Post by imperfectgolfer on Mar 12, 2013 10:46:30 GMT -5
Here is the KM-article on this topic - www.aroundhawaii.com/lifestyle/health_and_fitness/2010-05-second-magical-key-to-the-spine-engine-lumbar-lordosis.htmlThis is one of KM's weakest articles and it is full of inaccuracies. He starts the article by talking about the spine engine concept using this diagram. This diagram correctly shows the natural lordosis of the lumbar spine. However, he then introduces this photo image of Tiger Woods. He draws a red line along the left lateral border of Tiger's mid-torso and incorrectly claims that it reflects a greater degree of lumbar lordosis. That's pure BS! That concave curvature of the left-lateral side of the mid-torso is simply due to the fact that Tiger's upper torso has rotated more than the lower torso, and it happens naturally. There is no increased degree of lumbar spine lordosis in Tiger's spine at that time point. Like most pro golfers, the degree of lumbar lordosis doesn't change significantly during the backswing or early downswing action. KM then posted this image of another golfer. KM then stated-: " Remember the left side of Tom Agricola’s backswing looked like a straight line? This is due to the lack of lumbar lordosis. Soon after takeaway, he relaxed his lower spine muscles and shifted his hips to the left too early. In doing so, he lost his lordosis and spinal loading." That's BS! The left side of his mid-torso looks straight because he doesn't have much upper torso rotation and that left-side-bend of the torso has nothing to do with the degree of lumbar lordosis (which is defined as a concave curvature of the lumbar spine in the sagittal plane). One cannot see his lumbar spine from this viewing perspective to assess his degree of lumbar lordosis. KM also posted this image of Tiger Woods. That concave curvature of the back is not due to lumbar lordosis because the lumbar spine only extends upwards from the sacrum by about 6". That lower 6" part of Tiger's back (just above the pelvis) is only minimally concave - due to the natural lumbar lordosis, which in unchanged since address. The increased concave curvature seen between 6-18" above the pelvis is simply due to the differential degree of rotation of the upper torso relative to the lower torso. Jeff.
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