Heel cortex
Do it right first, then straighten your back, put your feet flat in front, and point your toes to the ground when your heels are raised. Hold it for a few seconds before you put it down. Repeat this action several times. You can also put books and magazines between your knees to increase the difficulty and gradually increase your weight in practice.
Lift your toes.
This action is the opposite of the above. Sit up straight, tiptoe up to heel, and then cycle. If you can't stand it, rest.
Leg extension
Sit up straight on the stool, straighten your feet forward, put your legs together, and then repeat this action. If you are in the audience or in a car, you can hook your feet on the seat in front, and then touch them to increase strength, so that your legs can be stretched and then thinned.
Leg exchange
Similarly, sitting in a chair, one leg bends to the chest, the other leg straightens forward, then draws circles in the air three to five times, and then exchanges with that leg to draw circles alternately. Another method is to sit still, with one leg bent, the toe of the other leg straight, write letters with the toe, and then change the other leg after writing, and so on for several times.
Grab things with your legs.
Sit down, put your legs on the ground, put an object between your feet, such as a pillow or sweater, and then pick it up with your feet. Colleagues tighten their trousers to increase the year. You can also put the object between your knees and repeat the lifting action, and do it several times in a row after getting familiar with it.
Knee lifting exercise
After sitting down, your feet droop, try to lift one leg, tighten your toes, and exchange the other leg after five to ten times, so that you can achieve the effect of stovepipe after several cycles.