Yes Revaji yoga does help immensely with all spinal disorders and helps not only to contain the damage but also provides natural traction etc, which prevents future episodes. But I suggest you identify the actual source of your back ache since infection in kidneys and stones are also said to trigger upper back (inability to bend) problem and middle back(cannot lift heavy things). I suggest you test for this: because in this case, abdominal twists, as in some of the poses, will exert undue pressure on the kidneys..
