When sitting, if you have nothing to do, make a fist with both hands and knock on both sides of your calf moderately;

Before going to bed at night, lie flat on the bed, raise your legs and do pedaling, 100 times ~ then spread your legs at an angle of about 80 degrees for more than ten seconds;

When you have time at home, wrap your legs with plastic wrap and twist them with rhythmic music, hee hee!

This is all my experience, very simple and effective! I hope it helps you ~

Original answer, laugh ~