I have lost about 6 kgs recently and have been exercising and have found that core work has definitely helped. My DS was 10lb and I am only 5'1 so you can imagine how huge I was, DD was big too. Anyway I still have some saggy skin going on and I don't think anything will ever help that part, but I definitely have more tone. I had c/s' as well so have the hang from where they cut. Regular exercise and yoga/pilates should help a bit but if it is mainly skin I think surgery is the only thing that can fix it permanently. I have decided to work hard at keeping myself fit and at a healthy weight and accept my belly for what it is. I am cursing the fact that when it was flat and toned that I thought I was fat ...ugh to be able to go back now!