In the 1950s, Robin McKenzie (Robin McKenzie) was a doctor in a small town in New Zealand. He had a “regular customer” – Mr. Smith, is a patient with a herniated disc, often back and leg pain. One afternoon, when Dr. McKenzie was too busy, Smith and hold the back, supported by people came in. McKenzie then pointed to a treatment bed – a patient just finished treatment, has not been adjusted down the end of the bed, the basic “V”-shaped bed, let Smith first lie on. When he finished, and then to find Smith, found Smith has disappeared. It turned out that Smith in that “special” bed lying for a while – because his pain so that he could not lie down – the pain actually disappeared. Since then, the “regular” is basically not how to patronize this small clinic, because whenever his back pain attack, will be at home according to the position in the clinic at the time to lie down for a while, back pain will be good. In this way, Robin McKenzie less a “regular customer”, but thus inspired to create the famous McKenzie therapy. McKenzie therapy is a kind of self-prevention method of neck and back pain that has been proved to be very effective by the medical practice of many countries, and its most outstanding point is that it reduces the medical expenses of back pain, which can be called the cheapest treatment method. According to McKenzie’s theory, when people work at a desk, the spine is in a forward bending state, and the gravity of the trunk makes the pressure on the front of the spine much greater than that on the back. In the long run, this causes an imbalance in the forces on the intervertebral discs and a pathological backward displacement of the nucleus pulposus, leading to bulging, protrusion and even prolapse of the discs. At the same time, the ligaments at the back of the spine are overstretched, which causes neck and lumbar pain. After all, the structure of the human body was gradually evolved to accommodate humans walking upright, and was not designed to sit for 5 to 6 hours a day. Therefore, to avoid neck and low back pain, the first thing to do is to develop good sitting and standing posture, while reducing long hours (more than 1 hour continuously) of ambulation. Usually do simple spinal health gymnastics, that is, every 40 minutes sitting, we must stand up to stretch the spine backward as far as possible 10 times; then the neck to the left and right side flexion (with the ears as far as possible to the shoulders) 5 times, and then left and right rotation (left and right) 5 times, the action should be slow, to achieve the maximum range of motion amplitude (the original neck and back pain, pay attention not to cause discomfort). Also pay attention to control the total time of sitting work, preferably no more than 4 hours a day.