Ladies...Diastasis recti?

Not from being pregnant, but I had a large diastasis recti from being obese with a large ovarian tumor, and I fixed it with exercise.

I read an article recently about a program which claims to have a high success rate, and I believe they use mainly vacuum type exercises - sucking in your stomach, basically.

What worked for me was first of all, stretches - if you stretch to touch the ceiling you can feel your abs kick in and pull together. Hold that position. It's sort of like a plank for people with no ab strength whatsoever. Then exercises like planks and push-ups. And eventually what really worked was the abs roller - which is, again, basically the same sort of exercise as a plank in that it's lengthening and resisting extension, as opposed to shortening and crunching your torso together. Crunch type exercises supposedly can even be harmful with a diastasis recti.