The physics of the spine.
in [Physics]
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From: john on 26 Jul 2010 11:37 A change in the region of the sacral ganglia(base of the spine) which happens to most people sooner or later, causes the pelvis to rotate. In most people this rotation causes the bum to go down and the front of the pelvis to come up. (Some 15% of people it goes the other way.) When the pelvis rotates so the bum goes down, it sends your spine out more to the rear. Your center of gravity moves to the rear. Now, in order to stand, you must bring your head and shoulders forward. This gradually rounds out the spine, taking away its nice arch, especially that nice part of the arch in the small of the back. Remember when your girlfriend had that? When she was young and sat, the crack of her bum was vertical and she had that little hollow right above. Now, when she sits, the crack of her bum is horizontal, and you don't want to look too close. When the pelvis rotates so the bum goes down, then the front of the pelvis comes up, and it gives less space for the musculature and the guts. The result? Love handles and pot belly. The spine curving forward compounds this effect of bunching up the abdominal organs and giving a squat, thick look. How do I know all this? Five years ago after 17 years of seafood vegetarianism followed by 5 years of being a vegan, my bum came back up. All of a sudden, when I got out of bed after two days of sore back and hips, I suddenly had to bring my head and shoulders *back* when I stood up. I realized that this is the way I stood when I was young!! In the last five years, my spine has been re-shaping, getting more and more arch. Latterly, it has been the very lowest part, the 'small' of my back, where things have very literally been clicking back into place- and not painlessly, I assure you. After the last increase in arch, my love handles simply weren't there anymore.The spine is now rising at a steeper angle, and there is more room for muscle groups. The increased arch gives so much more room for abdominal organs by lengthening and opening out the abdominal cavity. Translation: my belly is flat like a teenager's again. It's not how skinny you are, it's how your bones articulate. john |