After giving birth, your body is far from being in its pre-pregnancy shape. Both pregnancy and delivery have taken a toll on it, especially on your core. Your belly may still be big, because your abdominal muscles have been stretched and thinned out. There is often a gap between your straight abdominal muscles, a so-called diastasis recti, because they made room for your baby. Your pelvic floor has been working hard carrying your baby, has been overstretched and maybe injured during a normal delivery, or its connection with the belly muscles has been cut or torn during a C-section. A postnatal exercise course gradually rebuilds your core. For the large majority of women, such a course prevents the formation of health issues such as: