Keep your back and shoulders straight when sitting. Lean your hips against the back of the chair. Try to find a backrest to sit on, if there is no backrest: try to sit on the whole chair; Keep your torso straight for a few seconds, then relax. This is the most correct sitting posture. Try to share your weight equally on both sides of your hips. Don't cross your legs and put your feet flat on the ground; Avoid sitting in the same position for more than 30 minutes; Pay attention to adjusting the height of chairs and tables when working. You can lean your elbow on the handle of the chair and try to keep your shoulders relaxed. When you stand up, move to the front of the chair and stand straight. Avoid bending and standing.