There are many causes of low back pain in daily life, among which poor posture is one of the common causes. Therefore, in the process of daily life, work and study, maintaining good posture is effective in preventing back pain. 1, sitting posture Waist should be straight, legs flat on the ground, avoid maintaining a posture for a long time, or forced position for a long time. In general, we recommend that young people work in a sitting position for 40 to 50 minutes, and middle-aged and elderly people work in a sitting position for about 30 to 40 minutes, get up and walk around to relieve the fatigue and tension of the muscles of the lower back. If you must work in a sitting position for a long time, it is recommended to add lumbar support, or the use of soft cushions to maintain the physiological curvature of the waist and back. Sitting after excessive fatigue of the waist, the need to turn the side is to avoid over-torsion of the torso, the available swivel chair to complete the body twisting action. 2, standing posture to raise the head, chin back, shoulders straight and relaxed, chest slightly forward, lower abdomen straight, do not contain the back, maintain the normal curvature of the waist, so that the back muscles relax. If you need to stand for a long time to work, in the process of standing, learn to relax and adjust yourself to avoid standing in a single position for a long time. Avoid wearing high heels for a long time standing work. 3, sleep position Choose a mattress that suits you, sleep so that the back is completely relaxed and rest. When lying on the side, the waist should be straight and the knees slightly flexed. When lying on your back, you can put a towel roll or thin cushion to keep the waist curvature. When getting up, first turn on your side, then put your feet on the side of the bed and use your hands to support your body. Avoid the use of too soft mattress, it is recommended to sleep on a wooden bed with a mattress of about 5 cm. 4, the posture of extracting heavy objects first sit low hips, a foot in front of a foot in the back, and bend the knee, keep the back straight, pay attention to the arm and elbow close to the body, the object should also be as close to the body. When lifting heavy objects, the action should be consistent and slow, avoiding sudden movement and stopping, using the body weight to lead, and then use the foot force to support, lifting the heavy objects, avoiding direct bending to move heavy objects.