Because of sitting for a long time, 40.89% of the people felt sore cervical spine, 22.68% of the people had obesity problems, and 13.97% of the people suffered from periarthritis of shoulder. In fact, the danger of sitting for a long time goes far beyond that. As early as 2003, the World Health Organization pointed out that more than 2 million people worldwide die from sedentary activities every year. It is estimated that by 2020, 70% of diseases will be caused by sedentary activities, so sedentary activities are listed as one of the top ten lethal killers. In recent years, studies on sedentary hazards have emerged in many countries.
　　British Sports Medicine points out that people who spend most of the day sitting are at higher risk of obesity, heart attack or death. German medical experts suggest that sedentary people are more susceptible to cancer, because the number of immune cells in the human body increases with the increase of activity, sedentary people lack enough immune cells. A survey of patients undergoing gastric cancer surgery in Japan found that eating too saturated and sedentary are their common characteristics.
　　Cervical spondylopathy
　　Cause: The root cause of cervical spondylosis is the various symptoms caused by the loosening of the intervertebral disc after degeneration of the cervical intervertebral disc and subsequent compression of the nerve root, spinal cord or vertebral artery. Long-term bad sitting posture or long stay in front of the computer, the most likely cause neck muscle fatigue, neck and shoulder pain, neck muscle spasm, and even dizziness; over time, cervical disc degeneration is bound to occur prematurely after adulthood, leading to cervical spondylosis.
　　Lumbar spondylosis
　　Reasons: Because of long-term sitting, or some bad sitting posture, or always fixed a posture, the waist soft tissue is in a state of tension for a long time, soft tissue ischemia, resulting in lumbar muscle strain.
　　Injury of coccyx
　　Reason: Do you often feel a dull pain in your buttocks and tailbone, which sometimes makes you sit on your feet for two or three days? Don't neglect such symptoms. It's a disease that women are prone to - tail bone injury. Symptoms of coccygeal pain include tenderness or leg pain near the buttock and tailbone, ranging from the coccyx, levator ani muscle and surrounding soft tissue. If the coccygeal nerve is compressed in the wrong sitting position for a long time, the injury of the coccygeal bone will result in pain.
　　Butt "cocoon"
　　Reasons: Cocoon on the buttock means hard bumps on the long buttock, and dull pain, namely ischial tuberous cyst. Originally, the human hip bone is composed of the pelvis, in which the ischium is an important part of the pelvis. The ischium can be divided into upper and lower branches. The joint of the two branches is the ischial tubercle. When a person takes a sitting position, the ischial tubercle just touches the bench. At the top of the ischial tubercle is a bursa, which secretes fluid to reduce friction and compression between tissues. However, with the increase of age, the degenerative changes of the bursa and the decrease of fluid secretion occur in the elderly. It is easy to make the ischial tubercle "hard touch" with the bench by sitting at the desk for a long time or by the habit of sitting cross-legged for a long time. There are long-term unreasonable friction, extrusion, weight-bearing, trauma, over time will lead to traumatic bursitis, which mostly occurs on one side of the ischium, which may be related to the imbalance of sitting force. After the occurrence of bursitis, congestion, swelling and serous exudates in the bursa increase, and the prolonged accumulation of fluid will become viscous, turbid, and cellulosic sediment and adhesion. At this time, the wall of the synovium became thicker, the synovium surface was rough, and finally a cyst was formed.
　　Muscle soreness
　　Reasons: Billions of cells in the human body rely on blood transportation to complete their metabolic function. Sitting for a long time can reduce the amount of oxygen-carrying blood in the body, reduce the partial pressure of oxygen and increase the amount of carbon dioxide-carrying blood, increase the partial pressure of carbon dioxide, and cause muscle soreness, stiffness and atrophy.