No, on both occasions I was at fault when I ran in to a door frame and smacked my shoulder which yanked my back really hard and the other time I lifted my too heavy of a grandchild without bending my knees. Otherwise I have been pain free like I say after years of pain and unsuccessful chiropractic work on my back. I was very skeptical going in but so many of my friends were so happy with thier results that I thought I would check it out. My husband also goes to the NUUCA Doc and after 3 years of seeing clinic doctors and surgeons for his back pain our NUCCA Doc said by the way he walked it looked like it was his hip and she took more X-rays, $500 worth free of charge I might add, and found that he was bone on bone in his hip and needed a total replacement of which he had and can now walk freely again as he was using a walker.