1. One is to shake the hula hoop (aerobic exercise lasts for 30 minutes before you start to burn fat, so exercise for at least 30 minutes). After a week, you obviously feel the muscles on both sides tighten.

2. Stand with your feet slightly wider than your shoulders, your arms flat and your body "big". Then bend your back, touch your left ankle with your left hand, then stand up straight and switch to the right. When you do it, you will feel the muscles on both sides of your waist stretched. Do a group of left and right, do 30 a day.