 Are you suffering from severe neck and back pain? Have you tried physical therapy, chiropractic adjustments, acupuncture, shots, and are living day-to-day on pain medication? Well, I'm here to tell you that there's another option, and it doesn't involve surgery. It's called Vax-D and the Zenith A100. These two state-of-the-art decompression machines pull the disc back into position by creating a negative pressure within the disc.