As a growing teen, I started having back pain, and was diagnosed as my lowest 4 vertebrae being fused, and that I would have to do lifelong orthopaedic exercise. Since it only manifested when carrying things, I shrugged it off and never went. Two years later the pain completely disappeared until today. I have the worst sitting posture. No back pain. So if I don't have pain with some abnormalities and bad posture, I would speculate that the spine has ways to adjust to lots of circumstances given proper nutrition and rest.
It seems to me that if you had any sort of deficiency of any essential nutrients, the first manifestation in way of pain would be back pain, because that's the place where everything has to come together properly, all forms of body tissues are represented there and most mechanical strain. So why don't we think of it as a canary, instead of some localized problem that needs to be figured out? I mean I keep being amazed at the tools the body has to heal itself. Our job is not to withold the food and exercise it needs to do that.
