1. When sitting in class, take two thick books and put them between your calves. Don't let them fall. At the same time, stand on tiptoe. Put them down and have a rest when you are tired. When resting, you can't take off your books, but also hold them. If you feel sore in your calf, massage it and tilt your legs.

2, the same upper body is 45 degrees, tired, then massage.

3. Sit in the third part of the chair with your feet slightly off the vertical ground and your upper body straight. Lift your left foot with your legs, hold it for 5 seconds, and then put it down. Lift the right heel again and hold it for 5 seconds. Practice this heel lift alternately with your legs until your legs feel tired. ?

4. Sit in a chair, keep your upper body straight and your feet droop naturally. Keep your left foot still and lift your right foot parallel to the ground. Turn your toes clockwise 20 times, then counterclockwise 20 times, then put down your left leg and practice alternately until you are tired. Remember to hold your head up and hold your chest high when practicing.

5. Sit in a chair, keep your upper body straight and your feet droop naturally. Lift your legs and straighten them with the strength of your legs. Keep your legs parallel to the ground. Hold this action for 10 second, then put it down and go back to the beginning. Practice repeatedly until your legs feel tired.