The role of the spine, as follows: First, the role of the skeleton support: the spine is the pillar of the human trunk, located near the back of the trunk and pelvis right in the middle, playing a role in supporting the head and composition, as well as supporting the role of the thoracic cavity, abdominal cavity, pelvic organs, but also the supporters of the upper and lower limbs. Second, the role of safety and protection: the spine has four physiological curvature, namely, cervical, thoracic, lumbar, sacral curvature, so that the spine increases the ability to cushion shock, strengthen the stability, in jumping or strenuous exercise, the intervertebral disc can absorb shock to prevent damage to the skull and brain, while playing a protective role for the spinal cord, central nervous system and visceral organs. Third, the role of balance of movement: the upper end of the spine by the occipital bone to support the head, in the chest there are ribs colon thorax, upper limbs by the ribs, clavicle, sternum, muscles and spine, lower limbs by the pelvis and spine, the human body trunk forward flexion, back extension, lateral flexion, rotation and other movements and various activities of the upper and lower limbs, are adjusted through the spine to maintain balance. Fourth, the central role of nerve conduction: the human peripheral nervous system is composed of autonomic, sensory and motor nerves, distributed throughout the body through the nerve roots of the spine.