The four cylindrical design is in line with the mechanical engineering of the human spine.
The user can lie on it or perform appropriate limb movements at the same time, which can improve blood circulation in the back within 5 minutes, relieve the stiffness of the lower back, and reduce the degree of compression of the vertebrae Relieve pain and fatigue, so that the back muscles should be elastic.
When lying down, it helps to relax the back pressure during standing or working during the day,