Yes, I can totally relate. I sometimes feel so confined, especially on my really rough days. I used to be able to do a lot more, and am hopeful once my current situation is resolved, that I will be able to gain back some of my health that has been lost to this ongoing infection and the chronic inflammation it has caused throughout my body. I am praying that although I know not everything will be better, at least I will be able to once again go for an occasional nature walk.
I do think it helps to have some sort of outlet. I keep a few things here in the house that help me. Sometimes it's squeezing a stress ball, other times I need to vent by writing my feelings down, even if I later delete them. I also keep a ring toss set here in the office that I can use to let off a little steam. It's not the same as going for a run, which I'd love to do, down by the water, but those types of things will most likely never be available to me, so I'm learning to substitute less physically demanding tasks with ones that work for my new situation.