Have the Detensor therapy mat now for several weeks in use and my back pain is noticeably better. You can tell right as the spine stretches and loosen up the muscles. Of course this is just the beginning not necessarily pleasant, but the more frequent use, the less will be the pain. Very important is of course the Detensor to use more regularly and bring a little patience. My initial severe pain in the lumbar region have almost disappeared, and when I do have overdone it again, go the pain after lying again quickly back. A really great invention. Thank you.