Lie on your back and do abdominal exercises
Do it every night before going to bed. If you stick to it, you will have abdominal muscles soon.
Girls can develop a slim waist, and boys can develop sexy abs. Lie flat on the ground with your hands on your ears, but don't hold your head.
Lift your feet, bend your knees, and keep the angle between your thighs and abdomen less than 90 degrees.
Use abdominal strength to lift your upper body slowly and repeat 15 to 20 times.
