Everyone has to sit. It's a bit funny to say "can't sit". But in fact, not everyone can master the mystery of sitting posture, what kind of people should sit and how to keep the best sitting posture. These are all things you need to know. Analysis of lumbago caused by crossing one's legs Long-term and continuous sitting and working, especially crossing one's legs, will cause continuous load on the neck and back, and damage the muscles and ligaments of the back for a long time, thus causing unexplained low back pain. But as long as you keep a good sitting posture, you will return to normal after a while, and there will be no problem. In addition, sitting with your legs crossed for a long time, because your legs squeeze each other, will also hinder the blood circulation of your legs. Over time, it will cause varicose veins in the legs, and in severe cases, it will cause poor blood circulation in the legs, sudden blue veins, ulcers, phlebitis, bleeding and other diseases. At work, you can prevent neck and back pain by doing the following two things: one is to maintain a good sitting posture, and the other is to make correct chair movements. The correct chair movements are as follows: First, don't keep a sitting position for a long time, but constantly change between 2~3 safe sitting positions. Secondly, when you bend over to take something in a chair, you should first move your hips to the edge of the chair, put your feet forward, put your hands on the table, and then bend over. Third, when you turn around and take something, your whole body should rotate together. Fourth, when making a phone call, don't hold the microphone with your head and shoulders, but support it on the desktop with the elbow of the upper limb on the side holding the microphone, so as to keep your head and neck neutral and relaxed. Sitting comfortably is not necessarily good. Analysis does not mean that the sitting position that you feel comfortable is a good sitting position. The correct sitting posture should be that the upper body is straight, the abdomen is closed, the jaw is slightly retracted, and the lower limbs are close together. If possible, the knee joint should be slightly higher than the hip. If you are sitting in a chair with a backrest, you should try to keep your back close to the back of the chair on the basis of the above posture, so that the muscles of the lumbosacral part will not be tired. After sitting for a long time, you should exercise and relax your lower limb muscles. In addition, patients with lumbar disc herniation should not sit on a low stool below 20cm, but try to sit on a chair with a backrest, so as to bear part of the weight of the body and reduce the chance of lumbar strain. Analysis of tables and chairs without scoliosis Poor sitting posture is one of the important reasons for adolescent scoliosis. Nowadays, teachers in many schools ask students to pay attention to sitting posture, often from the perspective of preventing myopia. However, the adverse effects of the same specifications of tables and chairs for several years or even longer have been ignored. Primary and middle school students sit on desks and chairs that don't match their bodies all day, hunched over and writing sideways. After a long time, they will have backache. If not found and treated in time, it will aggravate the condition, cause physical deformity and affect cardiopulmonary function. Seats, tables and people's figure can largely solve the problems caused by poor sitting posture. Analysis of myopia caused by poor sitting posture If parents suffer from myopia, their children are more likely to suffer from myopia. A bad behavior that generally affects their eyesight is incorrect sitting posture. Especially junior students, we must correct the bad habits of sitting and writing and reading at close range in time, otherwise it will be more difficult to solve in the future. The correct sitting posture is generally the distance between the chest and the table, and the eyes are 0.5 meters away from the table. Because it is the easiest to ignore this aspect at ordinary times, you can put a reminder on the table or pencil box to remind your child to keep a good sitting posture at any time. The analysis of cervical spondylosis on the Internet shows that the root of cervical spondylosis is various symptoms caused by loosening of cervical intervertebral disc after degeneration, and then compressing nerve root, spinal cord or vertebral artery. The possibility of bone degeneration in adolescence is extremely small. The causes of neck and shoulder pain, nape spasm and other symptoms in adolescents are mostly related to factors such as poor sitting posture. Long-term bad sitting posture or staying in front of computer games for a long time, forgetting time, are most likely to cause neck muscle fatigue, neck and shoulder pain, neck and back muscle spasm, and even dizziness. Over time, cervical disc degeneration is bound to occur prematurely in adulthood, leading to cervical spondylosis. For the correct sitting posture of computer operation, please ensure that the whole sole touches the ground when sitting. Use an adjustable workbench, chair or foot pad to keep your feet on the ground smoothly. If a foot pad is used, make sure that the width of the foot pad is wide enough to allow the legs to move freely in the work area. Stretch your legs often and change your posture. Always stand up and leave the workbench, walk a little, and often change the position of your legs to relax people as a whole. Be careful not to put boxes or other items under the table, which will limit the space for your legs to move. Many people know that patients with benign prostatic hyperplasia should not sit for a long time, but the sitting posture of patients with benign prostatic hyperplasia is also particular. When people sit up straight normally, the center of gravity naturally falls on the position of the prostate. After sitting for a long time, the hyperplastic prostate will inevitably bear the weight pressure, which will inevitably lead to the expansion of the hyperplastic prostate to the urethra and oppression of the urethra. In severe cases, it will cause dysuria and even urine closure. If patients with benign prostatic hyperplasia consciously shift their center of gravity to the left hip or right hip in their daily sitting posture (the left and right hips can be rotated appropriately), the center of gravity of the human body can be prevented from directly pressing the hyperplastic prostate, thus avoiding or reducing the pressure of the hyperplastic prostate on the urethra. Long-term use of this method can play an unexpected role in protecting the hyperplastic prostate.