If you often sit in the office, what is the best height of the chair?

Do you know when the pressure on your lumbar spine is the least? When the tilt angle between the chair and the back of the chair is 135 degrees, the pressure is minimum. But in this case, it will become a half-sitting posture. Therefore, in order to conform to the working condition, it is suggested to adjust the chair back to1/kloc-0 ~120 degrees, so that you will not often have backache. Tip: How high is the backrest? Work chair: the low backrest can support your lumbar spine, and the high backrest can support your shoulder blades and neck. Leisure chair: the height of the backrest should reach the neck, just enough to support the head 39cm~50cm. How does the elephant leg stay the same? Then adjust the height of the chair to 39 cm.