Abdo separation will persist if women don't do postnatal exercise correctly. Abdo crunches and sit-ups are not indicated. Strenuous abdo exercise is indicated when the rectus muscle is no longer separated. In the first instance women should do transversus exercises along the lines of the abdo stabilizing stuff being taught for core stability in back pain management and prevention. Such exercise is easily done in standing and ultimately in any position. It makes sense to encourage women to do simple exercises little and often and fit them in when they can. How many Mums have the energy or inclination to be lying down to do a complicated exercise program with a new baby in the house?