How to maintain the correct sitting posture

Adjust the seat should be combined with the tabletop height and body condition, ensure the elbow Angle, waist Angle and knee Angle of three 90 degrees. First, place your hands under the table to adjust the height of your seat, and adjust your armrests to make sure your elbows are at right angles. Next is the body sit up straight, the line of sight falls in the center of the display, adjust the height and waist support. With the hips against the back of the chair, clenched fists should be able to pass through the space between the calves and the front of the chair. If you can't do this easily, then the chair is too deep and you need to move the seat forward or use a cushion.