I stopped being able to use my treadmill due to sciatica. I moved about six months ago and the extent of my walking has just been to get my poor dog outside. I also started using a recumbent bike where I now live and have worked up to 25 minutes a day. Yesterday, I finally threw in the towel and got one of those cortisone shots in my spine. I'm ever hopeful that this is going to get me back in action. They told me it might take 3-4 days to make a change but my leg already feels better this morning. The other thing I do is a DVD workout by Anne Pringle Burnell. It's called Stronger Seniors and is primarily chair exercises. As long as I don't have to stand I'm good to go and I really like her. It is broken into sections so you don't have to do everything. I usually do the warm up and the weights. I depend on the recumbent bike now for the aerobics.