I am being treated for tmj disorder. I have also some problems in my neck and back because I listen some crunching type sounds when I try to expand my chest or strech my neck and back. My dentist told me that I should not go for physiotherapy or something like this when I am going through their treatment (splint and ortho treatment). But i can do yoga or some safe exercise for my neck and back. Can you please suggest  some safe exercise for me to do at home?