How to sit on an office chair is correct?
First, adjust the desk or workbench to the appropriate height according to the nature of the work. Because different desk heights have different requirements for the placement of seats, and sometimes it is even necessary to change a seat.
Once the height of the desk is fixed, the height of the seat can be adjusted according to the "reference objects" of various parts of the body.
Eye level: Close your eyes, then slowly open them, the line of sight should fall on the center of the computer monitor. If the monitor position is too high or too low, then you need to make corresponding adjustments to reduce neck muscle strain.
Elbows: On the premise of sitting comfortably, keep your elbows as close to the table as possible to ensure that your upper arms are parallel to your spine. Place your hands on a work surface (such as a notebook or keyboard). Department is at right angles. At the same time, adjust the height of the armrests so that the upper arms are slightly lifted just above the shoulders.
Lower back: Don't huddle in your chair when you're tired, as this can put extra stress on your lower back and discs. Put your buttocks close to the back of the chair. It is best to put a cushion so that the back can bend slightly, so that when you are tired, your body will not shrink into a ball, and the burden on your back can be minimized.
Thighs: Check that your fingers can slide freely under the thighs, at the very front of the chair. If the space is too tight, you need to add an adjustable footrest to support the thighs. If there is a finger's width between your thigh and the front of the chair, then raise the chair height.
Calf: With your buttocks against the back of the chair, try to see if you can push your clenched fist through the gap between the back of your calf and the front of the chair.
