Now come up with a routine that a 70 year old with degenerative disc disease to do. I can’t find anything I can do to help build up muscle and lose weight that doesn’t hurt my back. Help!
Have you consulted with a licensed PT? Usually swimming would probably be safe but I know it is the dead of winter in most places now. If you do see a PT ask them about tai-chi a lot of older people do that do improve balance which is important when you do start a exercise routine. There are also chair exercises you can do. Again because of your problems consult a PT before starting.
Oh and something that may help is to make sure you are sleeping on a mattress that gives you the support you need.