I had back muscle mid-lower back pain for as long as I can remember (well, since my mid-teens. I'm 6'3). The last 9 months have been especially tough because following an injury that limited my mobility, I gained a significant amount of weight that worsened by back issues.
And then, for reasons beyond the scope of this conversation, I spent the last month sleeping in my car. While that was not an ideal development in my life, one unexpected benefit arose: my back pain... disappeared. Gone. I didn't even know it until I realized the other day that I was able to briskly walk for almost two miles without discomfort anywhere near my torso. It was a revelation, one that explained why despite sleeping in a car, and only for a few hours a night, I had been feeling so much healthier and better overall of late.
I was sleeping in the driver seat, and merely would recline the seat almost (but not quite) all the way back. I would estimate the incline of the seat to be around 20-30 degrees or less.
Now, I have a new place, and must make do with a comforter on the floor until I can afford a mattress. But I can already feel the state of my back deteriorating only after a few days, and absolutely do not want to return to the status quo. It is especially clear to me that sleeping on my stomach (which I am unable to avoid completely and often catch myself doing despite my best efforts -- help??) is especially deadly to my back.
I will see a doctor of some kind about my back problems this summer when my cash flow improves. Meanwhile, what to do? It seems to me that some sort of inclined arrangement that mimics the car front seat configuration would be ideal, but I am not quite sure how to replicate that setup with my currently meager means.