4. Breath, breath, breath!
There is another simple exercise which you can do in public and no one will notice anything at all. It is an exercise for your abs. You should learn to breathe deeper than usual. Start practicing it a few hours after the baby is born. Sit up straight. Put your hands on the stomach. Inhale. Breathing must be deep, from the diaphragm. Hold the breath for a few seconds. (You can start form 10 sec and then increase the time). Now slowly exhale. Relax. Repeat.