Method 1: Sit-ups: A: Lie flat, cross your legs, and put your hands behind your head, just like preparing for sit-ups. B: Take the lower abdomen as the center, lift the upper body, and at the same time draw your feet forward until your elbows touch your feet. This posture looks like crouching, so your mind should focus on your lower abdomen. C: Return to the original posture and repeat the above steps for 30 times. A: Lie on your back with your legs bent at 45 degrees. B: Legs are alternately extended and retracted. This posture is like the movement of your feet when riding a bicycle. C: Take one step forward with your feet and keep it off the ground for about 30-60 degrees for 5 minutes. This method can exercise your thighs, waist and lower abdomen, which means you can lose more fat in these three places.