I never open my curtains at home either.
I never open my curtains at home either.
For me, sitting in the dark is depressing.
I feel much better in a dimly lit room. Not pitch black but a twilight kind of darkness.
However, I am autistic so that may have something to do with it. I only recently realised this. Ever since I've lived on my own I kept my curtains closed and my room dimly lit, but I never made the link to my autism or sensory issues. It seems kind of obvious in hindsight.
For some reason things that make 'normal' people happy have the opposite effect on me, and vice versa. For example, socialising makes me feel depressed while the more time I spend alone the happier I am. I don't think I've ever felt lonely either.
To many people NOT socializing doesn't compute.
Mea culpa, Mea maxima culpa.
Compared to what, sitting?
We already spend 8 hours "lying on our back" every day -- sleeping, and we have evolved for it. It also puts little pressure in our body compared to sitting for hours on end.
I think once you become quadriplegic you have bigger problems than your position when using your computer, but overall user on your back is definitely better for me than sitting up in my chair.
* Yes, that is the correct medical term.