Hi. there are a number of Physio's in Australia who use them for spinal stabilising programs - I used to use them for chronic pain problems but have stopped since a lady had a major flare up doing some of the Paul check type activities, which were simple enough for people without back pain, but I have since gone back a few steps to working on the floor or bed first. what country are you from? Are you following anyone's routines ? Have you seen the Paul check workshops? ( they are quite advanced but a good chalange)