Correct sitting posture gives you health. How to sit correctly?

1, the upper body should keep the neck upright, so that the head can be supported, the shoulders naturally droop, the upper arm is close to the body, and the elbow is bent 90 degrees. When operating the keyboard or mouse, try to keep the wrist in a horizontal posture, and keep the center line of the palm and the center line of the forearm in a straight line. The waist of the lower body is straight, the knees naturally bend 90 degrees, and the sitting posture with both feet on the ground is maintained.

2. You must choose a desk and chair with ergonomic design, use a special computer chair, and sit on it to follow the "three right angles": the first right angle is formed at the knee under the computer desk, the second right angle is formed between the thigh and the back, and the third right angle is formed at the elbow. Lean your shoulder blades against the back of the chair, put your shoulders down and keep your chin away from your neck. Look straight at the center of the computer screen, preferably with a supported chair back and armrest, and the height can be adjusted.