Section 1: Ankle function exercise: lie on your back, straighten your legs, pedal both ankles down as far as possible, then stop, maintain for 10 seconds, then extend your back up as far as possible, maintain for another 10 seconds, nothing to exercise. Section 2: leg extension exercise. In the supine position, raise both lower limbs alternately by bending the knees up as close to the lower abdomen as possible, just like pedaling a bicycle, and repeat 10 to 20 times. Then bend the knees and lift both lower limbs at the same time, as close to the lower abdomen as possible, and repeat 10 to 20 times. Section 3: straight leg raise functional exercise: lie on your back, straighten your right leg, bend your left leg, use your left foot as the fulcrum, then power up your right leg, gradually and slowly lift it up to 45 degrees, then stop, maintain for 10 seconds, then slowly lower it, stop when it is about to reach the bed without touching it, then maintain for 10 seconds, then slowly raise it up, do 20 to 30 times, then switch to the right foot as the fulcrum to complete the same action. Section 4: waist exercise. Lie on your back, bend both knees, make a fist with both hands, bend both hands on the side of your body, lift your waist and hips up as much as possible, lift your chest, and slowly carry out 10 to 20 times. Section 5: lying on your back, left leg flexed, then waist and back force, the left foot, shoulders as the fulcrum, the right leg, hips, back lift, the right leg can also swing in the air a few times to increase the difficulty of waist control, do 20 to 30 times, then switch to the right foot as the fulcrum to complete the same action. Section 6: daily practice to lift the anus and abdomen 60 times, after lifting the anus and abdomen should be maintained for more than 30 seconds, while maintaining a normal breathing rate do not hold your breath. The above exercise 3 times a day in the morning and 3 times a day in the evening cycle, the number of times completed, such as not able to reduce the number of times, do a few more cycles. The number and intensity of this exercise method varies from person to person, and can be practiced more than ten times a day to more than a hundred times a day, in 3 to 5 groups to complete. Pay attention to the gradual progress, each day can gradually increase the amount of exercise. If you feel soreness, stiffness and other discomfort in your back the next day after exercise, you should reduce the intensity and frequency of exercise appropriately to avoid aggravating the symptoms; don’t exert too much force suddenly when exercising to prevent sprain. It can effectively avoid deep vein embolism and increase the strength of lower limbs.