My physical illness does limit my ability to exercise. However, there are also issues mentally. I think, mentally, it is really difficult to do things that I know are good for myself. I would rather not eat then exercise. Neither of those are good for me not to do. I'm not even good with doing exercise at home.
Now, before I got into this down slump(about 2.5 months ago), I had started exercising a few times a week. Plus I was more active then I now am. Thankfully, my physical health let me do this. I tried not to get panicky about the people I was going to run into at the club. Tried not to focus on them. Or, if I did, I tried to notice the one's who were in the same shape as I was and think of the positives of them doing it. If I looked at the people who already were in shape, I would just feel bad and inadequate. Then my mental health became bad again and I am immobile at home. I'm trying, baby steps, to get out of this slump with meds and therapy.
As far as yoga, I've tried that and tai chi and I can not get my head around either of those. Actually, my head does not shut up enough to help me relax. Too hard to get that calm and centered even in my own house.
Granted, with most exercise I have to, one, make sure I don't put myself into any arrhythmia(even safe kinds because my defibrillator can not tell the difference), or put myself in a position that would take the chance of dropping my bp too quickly and passing out. Doesn't exactly add a positive reinforcement for exercise.