Gotcha, Frank. At least you've made it a point to know your own body and what does and does not work. Generalizations are worthless, I know. We all have different situations, for sure. I am going to try a new program this morning with Silver Sneakers. I could not walk at all when I first arose, due to muscle contractions in my legs, stemming from a sacral pinched nerve problem that's been ongoing forever. Or so it seems. Once I did inializing stretching out, I was ok. But the pain is excruciating.
I get those kind of cramps. My feet get all twisted up when they happen, they turn inward and the soles face upward and my toes point north and southward; crippling pain and literally crippling.
Imaging has shown time and again that it isn't sacral, no matter how hard my spine docs insist it hasta be.
In my case, it's the obturator nerve, which originates at L4.
Here's the thing: There's supposed to be only one nerve root on either side of each vertebra. My L4 has two on one side and one on the other, and that extra one presses against the other, sometimes a lot, sometimes not a lot.
It's assumed that abnormality is a birth defect, possibly genetic, and extremely rare...3 reported cases world wide when mine was observed during open surgery in 2017.
I'm certain redundant nerve roots are genetic, that they can occur anywhere in the spine, and that they're actually pretty common. Nerve roots are super-tiny things and it's only recently that
some types of imaging can pick them up. I'm betting that doctors are going to start seeing a lot of these as imaging gets better and better.
I don't doubt redundant nerve root (aka, twinned nerve root, aka, double nerve root) is the cause of most people's chronic back and neck pain. Shiddy thing is, you can't remove the evil twin, or kill it with chemicals. They branch off. They do things; they operate, like any nerve root.
Probably someday, surgeons and back specialists will figure out how to isolate them, so the two can't come into contact with each other and trigger pain and those wild leg and foot symptoms. And, I think probly soon, like within 5 or 10 yrs.
I'm guessing twinned nerve roots in the cervical spine cause visual disturbances, hearing loss, shoulder, arm, and hand pain, numbness, burning, and trembling....those sorts of things.