Re: chronic back tension
One reason for muscle tension is due to guarding. The body automatically adjusts to keep a person upright...to keep the person from falling over. When these stabilization sensors get a message that there is some danger to the spine, signals are sent out to work harder, The muscles tense up in an attempt to protect the spine. This can lead to muscle spasms and cramps.
If you have a structural misalignment somewhere between your feet and your head, it can result in this situation. If you have some instability in your spine, muscles will guard and the result will be this stress and tension.
And finally some people carry lots of stress through their upper bodies. Poor posture can make the situation worse.
The more tension you carry, the worse the symptoms become. It is a vicious cycle.
Do you know if you have any instability in any segments of your spine? Have you had a MRI or CT scan?