Hello nanapug - good to hear from you again.
It is a vicious circle - pain in back/knees/hip (or wherever) - unable to be so active - put on weight - pain gets worse!
Try googling You Tube seated exercises - I found several and they are good for improving fitness in the privacy of your own home, without putting too much stress on your painful places.
I am about to embark upon some pre-hip replacement exercises which I have downloaded from the net.
Good luck!
BBC2 Proms - Celebrating James Bond tonight

