It can help to start out out at by thinking about the anatomy on the spine. There are 3 defined zones in the backbone; the cervical, thoracic and lumbar verterbrae. The cervical backbone will be the upper 7 segments that are located in your neck. The Rumble Roller is http://buyfoamroller93578.xzblogs.com/15339792/gym-foam-roller-can-be-fun-for-anyone