Fixing Diastasis Recti?

There is an article on NPR about "flattening the mummy tummy."

It's more specifically about using ab contraction and draw-in exercises to fix diastasis recti. That is when your abdominal muscles have physically separated. It's fairly common after pregnancy, but plenty of men get this from a variety of other causes.

Flattening the mummy tummy with 1 exercise 10 minutes a day

I see no reason why 10 minutes of contraction, 2 minutes apiece over 5 exercises, wouldn't have a positive effect. I haven't tried this as I don't have diastasis recti. But I have used draw-in exercises, so-called "vacuum" exercises, and fully-exhaled deep contraction exercises on my abs with some success in the past for general strengthening. It seems worth a try if you have this problem. You can fairly easily glean a workout routine for this and do it daily for a few weeks and see if it improves your abs.