I must stick to this method. Very convenient, especially effective for students. Method: When sitting in class, straighten your body and tighten your legs. You'd better add a notebook or pen to your knee. Then lift your feet off the ground about 10CM. Keep your body upright. After 30 seconds, you will be tired and sore all over. Practice for 45 seconds and rest 15 seconds every day. The slimming effect is obvious. Mainly thin thighs and fat waist! ! And lie flat on the bed when you are ready to sleep at night, then lift your feet 20CM away from the bed surface and make an included angle of about 160 degrees! Stick to 10 minutes every day. I lost 8 pounds in 30 days! ! ! alcoholic anonymous