Back stretching

A few months ago I could bend over to touch the floor and get my palms on the ground. Now my fingertips are a foot from the ground! Is it safe to stretch my back? How can I get my range of motion back in my back? Sclerosis causes thickened bone but it's crappy bone and not very strong. I don't want to break anything. I'm already on Enbrel and methotrexate and an NSAID.

I'd talk to your dr. about how much stretching is safe. IF you get the go ahead, there are a lot of gentle yoga poses on Youtube, many for people with back problems.