The knee of human body is the most complex joint in all joints of the human body, and the function of the knee is also very powerful. The daily life of human body such as sports and work can not be separated from the knee. At home, most of us have heard that our elders will complain about their own knee pain, especially when it is cold in rainy days There will be an increase. < / P > < p > because the human body is widely used for the knee, the knee will continue to wear and tear, and with the increase of human age, the human knee will appear different degrees of aging, which is more likely to cause damage to the knee, affect the daily activities of the human body, and cause harm to human health. < / P > < p > the muscles and joints of the human body need continuous movement to ensure the normal operation of the blood circulation of the human body. If the limbs are kept at rest for a long time, the discomfort symptoms of muscle stiffness or soreness will appear in the limbs. < / P > < p > nowadays, many office workers sit for hours while working. If they sit for a long time, they will not be able to exercise effectively. Not only will their knees be easily injured, but also their gastrointestinal functions can’t be effectively improved, which is detrimental to the digestion and absorption of the human body. < / P > < p > standing for a long time or sitting still for a long time will cause extremely serious harm to the knee of human body. Some office workers in the state of long-term sedentary, rush to get off work after work and run downstairs quickly, which will cause more serious injury to the knee. < / P > < p > because if you don’t exercise for a long time, sudden strenuous exercise will produce huge pressure on the knee. Sometimes long-term non exercise and occasional overload exercise will lead to bone fracture in the human body, which will cause great harm to the human body. Therefore, in daily life, it is not only beneficial to get up or move your body frequently The knee joint of the human body also has a great help to the blood circulation of the human body. < / P > < p > many people don’t pay attention to their own walking posture when they walk. Many people keep their bodies in a forward leaning state when they walk, which produces great pressure on the knee joints of the human body. Once the walking time is too long every day, as time goes by, the knee joints of people will be overburdened. In addition, long-term incorrect walking posture will lead to accelerated aging of human ligaments and lead to heavier pressure on the knee joint. Therefore, timely adjustment of walking posture is particularly important for the protection of knee joint. < / P > < p > many people will not do some warm-up exercises when they exercise or exercise, which will lead to the muscle bones and joints of the human body not fully extended. Once the intense exercise is carried out, it is easy to cause muscle strain, and even lead to bone and joint damage, which has a very adverse impact on the human body. It is a thing that everyone of us will sit on. However, if we do it for a long time, it will easily cause damage to the human knee. Moreover, some people who are on duty for a long time will cause damage to their knees if they sit for a long time. In addition, it will aggravate the degeneration and damage of the knee cap. < / P > < p > therefore, in our daily life, we should pay attention to our various postures to avoid adverse effects on the knee and harm to human health. After pregnancy, do not let the wife do these five kinds of housework, the husband should be responsible for it, otherwise it is easy to hurt the fetus!