This was the key post on that thread; will paste whole thing
^WallaceWindsock Sat 24-Aug-13 09:09:47
I have found after huge amounts of trial and error, a set of exercises which are slowly but surely pulling everything flat. This is exciting as I had diastasis recti (separated tummy muscles) after birth and I have now closed the gap to one small finger space, so they really work.
To pull my ribs back in I just did loads of hula hooping and danced about like I was giving a lap dance!! The waist circling movements pull the muscles together.
For tummy I eased in with ten of each of the below exercises twice a day. I'm now up to 80 of each twice a day.
Lie on your back with knees bent. Pull your pelvic floor in and your pubic bone up as if trying to curl it towards you. This is a pelvic tilt. Hold each one for as close to ten secs as you can. Once you have the hang of it you can make it more advanced by extending a leg and stretching it along the floor at the same time.
Next lie on your back with knees bent, feet on floor. Using JUST stomach muscles pull one leg up so that its at 90degrees, hold for ten secs and lower. Do the same with the other one. Once you've got this down, do both together and you can do short quick stretches where you don't allow your feet to return to the floor.
Lastly, and this is the real one for closing the separation gap, lie in the same position. Put your hands onto your tummy and push the two halves of your tummy together, as if manually closing any separation you may have. Then keeping hands pushed together raise your head off the floor. You want to raise it just enough that you aren't yet doing a sit up, but can feel it working your muscles. Do this as many times as you can and slowly. Once the muscles have knitted you can put hands behind your head and lift your head further and do the exercises quicker and for longer.
If you don't know if you have a separation type "checking for diastasis recti" into YouTube and there are videos showing how to do it. A lot of exercises can make the separation worse and as I said up thread these seem to be something which isn't a quick fix but which has actually really helped recondition my muscles. I've gone from a 3 finger gap to a very small one finger in 5 months and the muscles feel much stronger. I also make an effort to pull the muscles together, like doing a zip up from the bottom to just above rib cage whenever I'm walking around, literally all the time. This has helped me feel better about my figure and again helped strengthen them.
Sorry for length, I get very cross when I see people advising crunches etc as for a lot of women this can make the muscles bulge once you've had kids and doesn't actually help knit everything together tightly. Hope this helps!^