I have 2 herniated cervical discs and thoracic back pain chronic now. I have never had neck back issues, I have no history of falls or auto accidents. I do have long periods of time over 8 years sitting in a Honda Odyssey. Myself or doctors cannot find a cause of my injury, until it became clear. Since the pain was first felt sitting in my Odyssey and then after treatment to relieve the pain, it came right back the minute I got back into the Odyssey, the posture in this seat is so unhealthy your whole spine is thrown off alignment. Your neck is pushed into a unnatural bend.