There is a saying in China that "men are poor and women are cheap", which means that it is a bad habit for both men and women to shake their legs frequently. But in fact, for office workers who sit in the office for a long time, it is a good habit to shake their legs often after intense work without affecting others. "Simply standing for an hour is often more uncomfortable than walking for an hour. The same is true for sedentary. " Wang Jun, a doctor of exercise physiology at Beijing Sport University, said, "Sitting for a long time will lead to stagnation of qi and blood, muscle relaxation, decreased elasticity, lower limb pain, fatigue and fatigue, and even affect blood circulation." Shaking your legs properly can promote venous blood flow, accelerate blood return and relieve the feeling of pain and fatigue. In addition, shaking legs can also burn leg fat, which has a slimming effect. In addition to shaking your legs, patting your legs with both hands, standing up and taking a few steps can also achieve the above effects. For the elderly, sitting for a long time, such as playing chess, may also cause deep venous thrombosis of lower limbs. When suddenly standing up, the thrombus may fall off, return to the heart with the vein, and then reach the lungs, causing fatal "pulmonary embolism." Therefore, shaking your legs often has a good effect on preventing embolism. ▲ (Dong Changxi) Life Times (2009-02- 10, 4th edition)