spinal undulation

What may be a Salvia-insight is that, again, I think it would be helpful for me to "loosen" my spine. My habit of "cracking" my neck during mild Salvia sessions concerned me a bit, but I'm fairly sure I haven't been hurting myself. Nevertheless, to move toward a healthier type of exercise, based on my observation of myself making undulating fish-like movements while salvianated in bed, I thought to find some information about undulation of the spine, so I found these:

google for:

undulating spinal

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http://www.youtube.com/watch?v=Dg-PTkpE06A

http://www.scribd.com/doc/76363495/Self-Awakening-Yoga
Well, I haven't read much of that yet...interesting that it mentions Kripalu...


This is exactly the sort of undulation I was talking about:

http://www.yogaia.org/about.htm

"The Key to Yogaia is the undulating spinal wave, in every movement of the practice, whether standing, sitting, or kneeling, bending back and forwards, twisting, reclining, or upside down."

Again, it seems to me to be a salvia-insight that this sort of undulation may help me loosen my spine, which may be, perhaps, to open up the energy centers/chakras of the body.