I'm not exactly crippled -- I went on a seventeen-mile bike ride yesterday, and found it disappointingly short -- but I do need to ration my standing-still time.
I pressed creases into three binding strips with the ironing board lowered to sitting height, and because I was in a secretary's chair, I could scoot back and forth at least as easily as if I'd been standing.
It's also convenient to scoot back and forth between the Necchi and the computer. But I have to stand up and drag the chair to the treadle machine in the other room; tiny castors won't ride over carpet edges. (And the route is a little convoluted.)
Perhaps the same trade names aren't used in your stores: In mine, an office chair with arms is an "executive chair", one without is a "secretary's chair". My secretary's chair is my spouse's old executive chair, after he wore out the arms.
(I've replaced it twice. The first replacement fell apart before we'd gotten around to getting rid of the old one, and the second replacement couldn't be adjusted low enough; I gave it to my taller niece.)
It is much easier to work in an armless chair, but some of us need the armrests to help us stand up. I can still do without arms nicely if I get my center of gravity over my feet before trying to rise. If I've been sitting long enough to stiffen, I may need to push on my knees.