The intervertebral disc is like a “spring sheet”, soft, wrapped by a fiber ring, which allows the spine to bend. If a long time in the incorrect posture, often under pressure or stretching, “spring sheet” outside the ring of fibers may rupture, inside the thing will be bulging out, touching the nerve, caused by lumbar and hip and lower limb pain, numbness, that is, lumbar herniated disc. Sit down and rest? The lumbar spine does not agree! People often say sit down to rest, think “sit” is a kind of rest, but for the lumbar spine is an exception. People lie down, the lumbar intervertebral discs carry the least pressure; standing second, when the head, torso, the weight of the upper limbs ultimately to the arch of the foot; leaning forward in a sitting position, the head, torso and upper limbs of the weight of the lumbar vertebrae, the only lone point of support, the lumbar intervertebral discs at this time to carry the greatest pressure. Therefore, long-term work or incorrect sitting posture is easy for people to appear lumbar muscle soreness, pain. Half lying most comfortable? The lumbar spine is the most injured! Nowadays, young people are busy at work, the most pleasant thing to do after work is to half lying on the bed or sofa to play cell phones, reading books. However, half-lying position, the lumbar spine will be due to the lack of adequate support, resulting in the original curvature is changed, so that the intervertebral discs are subjected to increasing gravity, inducing disc herniation. The lumbar spine has a normal physiological curvature, under normal circumstances, the lumbar spine of the force point is generally in the lumbar 4, 5 and sacral 1 position. Semi-recumbent position, the back of the lumbar overhang, lumbar vertebrae in a folded state, and no support, the weight of the upper body is fully pressed to the lumbar vertebrae on this point of force. Standing, lumbar back muscles, ligaments will help the lumbar spine to support the weight, but semi-recumbent position when the muscles, ligaments are in a state of flaccidity, the loss of the original fixed role, the spine deformation, physiological curvature straightening, over time will result in connecting the lumbar vertebrae of the intervertebral disc bulging. Doctor’s note: spine disease due to years and years of inadvertent accumulation of bad habits, the following three situations to avoid: 1, bending over to move heavy objects, will make the lumbar spine is very “injured”. The correct posture is to squat down to hold the item stable and then gradually stand up. 2, please nestled in the sofa half leaning, is the so-called “couch potato”, easy to make the lumbar spine deformation. 3, sedentary. Old meeting people, need to work at home, the best one or two hours to stand up and walk. Sitting, head and lumbar spine center of gravity line should be perpendicular to the ground, lumbar to have support. A good cushion should be prominent in the center, up and down for the arc transition, and to have a certain degree of hardness. When there is no cushion, the buttocks should be full of the chair surface, so that the lumbar spine has to rely on, do not hang in the air.