First I can't believe a Dr told you if you died it won't matter because you have a poor quality of life anyway! He should be removed from practice!

Having MG and Fibro is hard, I know but I don't take Prednisone do to my super sensitivity to it but when I was on it I too gained a lot of weight {as everyone does}

As for exersise, it is hard but as long as you do a few minutes every few hours that would be better than nothing at all. I will sit and lift small weights until my arms start getting weak and I know I won't have to do anything for awhile. I sort of just fit in exersise when I can and it isn't a lot but like I said it is better than nothing.

As for the lap-band, I just don't know enough about it to give any advice but I hope someone can help you.