Don't take diet pills. The best way is to increase exercise and control diet. If the leg is congenital bending, don't blindly pursue it. If the thighs are too thick to feel straight, it is best to swim to press the legs. We have a student who has just finished the college entrance examination. While waiting for the notice, he plays badminton for 2 hours every day, swims for 1.5 hours, and doesn't eat greasy and starch for dinner. The effect is quite good. I wish you success!