Seats are not comfortable easy to cause lumbar spondylosis! Many units equipped with seats for employees only ask the price and quality, do not care about the design of the seat, in fact, a qualified seat in the design requirements are very high. Good seat has the following characteristics: 1, the base is hard, strong support, not because of body weight pressure and tilt. Generally speaking, the height of the base from the ground to 40 to 45cm is appropriate (particularly high or particularly short people on the other hand), the height is basically the length of the calf, sit on the feet can be naturally placed on the floor. If the seat base is easy to move, poor support, the human lumbar muscles will instinctively tense to keep the upper body smooth, the lumbar muscles are more likely to strain. 2, the curve of the back of the chair undulation and the curvature of the human spine coincides with the lumbar projection on the lumbar support, the back of the chair is high enough, the upper part of the projection, can be bracketed cervical spine. Many boss chairs designed with a high back, the seat is very soft, this design will focus on the sense of majesty and hip comfort, without considering the health of the spine. 3, for the use of computer office family, the armrest height is also important, its height to support the elbow joint of both elbows. Many of the armrests of the seat only play a role in allowing hand-holding. Office workers operate the computer, arms bent down, only two hands on the health, no support for the arms, the power falls on both wrist joints, over time will be tired of wrist joints, neck and shoulder muscle joints. If the armrest can support the elbow joint, the shoulder muscles are less prone to strain. Here to mention the heart of everyone, office chairs to choose the kind of hard base, the back of the chair design in line with the human physiological curve, so that the protection of the back muscles and spinal health is very good. Some people sit for an hour or two, the lumbar back muscles in a state of long-term tension, may suffer from chronic fasciitis, cervical spondylosis, frozen shoulder and other diseases. It is recommended that office workers get up every thirty to forty minutes to move their neck, shoulders and waist.