I've been working out and losing some weight, I have a long way to go, but what I have done so far has made a major impact on my health, arthritis is now GONE, blood pressure is down, blood chemistry is great and I should live a lot longer now, assuming I don't step out in front of a bus or anything...
When I started on this odyssey, I could barely make it from the car to the office after a half-hour walk at lunchtime, my arthritis was so bad. My co-workers had serious doubts that I'd be able to keep it up, but I did, and I repeat - the arthritis is GONE. Really, it's gone.
So, even if you really, honestly think that you just can't exercise, do it anyway. It will hurt like hell at first, but if you work through the pain and keep it up, you will prevail, and you'll live a longer, healthier, happier life.
Oh, and the rabbits are doing great! Got some BOBs and some BOSs this year, just about every time out. :)