1. What is an ergonomic chair?
The ergonomic chair is a seat designed to fit the human spine and reduce physical fatigue for sedentary people. To a certain extent, it can reduce the burden on the human head, waist, shoulders, and spine. It is mostly used in offices, Internet cafes, etc. Now many families also like to buy engineering chairs to improve the comfort of their homes.
2. How does the ergonomic chair protect the human body?
Sitting for a long time is most likely to have 3 diseases: lumbar disc herniation, cervical spondylosis, and frozen shoulder. The engineering chair is designed to prevent these three diseases:
1) Lumbar support
Like the lumbar support of the car seat, the lumbar support of the engineering chair can correct the sitting posture. When a person sits down, the support points of the backrest are at the iliac-sacral joints and lumbar joints (5 vertebrae upward from the iliac-sacral). The weight of the upper body is all pressed on the waist. Sitting for a long time is easy to accelerate strain and induce lumbar disc herniation. Lumbar support can relieve the pressure on the waist. The better the fit, the easier the body.
2) Chair back
The standard sitting posture requires that the angle between the human body and the horizontal seat is 90 degrees. If you sit for a long time, not only the lumbar spine is burdened, but the pressure on the upper side of the spine will also increase. The engineering chair can form an elevation angle of about 125 degrees backwards. The more the back of the chair conforms to the curvature of the spine, the less force the spine can bear, thereby reducing strain.
3) Headrest
Many office chairs are not equipped with headrests, which is unscientific! The engineering chair must be equipped with a headrest, and the position is preferably adjustable, which can be adjusted back and forth following the elevation angle of the back of the chair. The cervical spine is a relatively fragile part of the human body, so the headrest cannot be loosened, and strict fixation can achieve a good support effect.
4) Handrail
The armrest may seem simple, but in fact it can affect the sitting posture the most. Too high will cause shoulder shrugs and squeeze trapezius muscles and cause shoulder problems; too low will cause the arms to be unsupported and the body will tilt sideways, which will lead to scoliosis for a long time. The normal height of the armrest should be the position where the person is sitting on the chair with the arm hanging down naturally, the arm can play a supporting role, and the armrest does not affect the pushing of the chair into the table.
When buying, try to choose an engineering chair that can adjust the height of the armrests to protect your body better.