Upper abdominal training
Sit-ups are a good way to exercise the upper abdomen. Do at least 3 groups every day, with 20 in each group.
Lower abdominal training
Lie flat, legs straight, feet together, slowly lift, make a 90-degree angle with your body, and then slowly put it down. Do at least 2 groups every day, one group 15.
Reduce the sides of the waist
Shaking the hula hoop and bending over is a good way to reduce both sides of the waist. After shaking the hula hoop for a week, I obviously felt the muscles on both sides tighten. Bend the left and right sides of the waist into a ball and do 30 pieces every day.