When a person is lying down, the spine carries a pressure equivalent to about 25% of his or her body weight. Relatively speaking, at this time, the spine is the most comfortable, bearing the least pressure. When lying on your back, you can pad a pillow at the leg bend to maintain a certain degree of curvature; when lying on your side, it is best to make the legs slightly bent, and a small pillow between the legs to ensure that the spine and head remain in a straight line. Stand When standing, the spine carries 100% of the pressure, but when bending, the spine carries 200% of the pressure. Many people feel more tired standing than sitting, while in fact, the pressure on the spine in a standing position is less than when sitting. It should be reminded that crooked standing will increase the tension of the muscles on one side, over time, not only will make the muscles stiff and sore, but also cause uneven forces on both sides of the lumbar spine, resulting in low back pain. Good standing posture, should be slightly retracted chin, abdomen slightly tightened, pelvis slightly forward. If you need to stand for a long time, it is best to step on a 10-15 cm high pedal with one foot and alternate feet every now and then to reduce the load on the lumbar spine. When carrying heavy objects, do not directly bend over, should first squat, keep the upper body upright, and then stand up with the muscle strength of the legs. Sitting, the spine carries 150% of the pressure, sitting body leaning forward (such as using a computer), the spine carries 250% of the pressure. Sitting, chest and abdomen to minimize the pressure on the intervertebral discs, and in the arm support sitting, backward leaning sitting, forward leaning sitting, the disc pressure increases in turn. A good sitting posture first need a comfortable chair. Chair should not be “too deep”, sit down when the hips can sit full chair, so that the waist and back completely close to the back of the chair; two feet should be flat on the ground, so that the knees are the same height or slightly higher than the hips; secondly, find a comfortable cushion, preferably with the lumbar spine completely fit, the material is a little harder, with a certain support strength. Lumbar close to the cushion, not “only pad not lean”; finally, if sometimes have to “”hunchback”, may wish to pull the chair closer to the table step, or move the computer monitor on the table a little closer.