Greetings, fellow waist seekers! Azurblue's advice about the hip swivels is terrific. I had an ectopic pregnancy in my 30's and had surgery, a horizontal incision. When I was heavy--in the mildly obese range, I was getting the dreaded "apron."

I was afraid I'd never find my waist or lower belly again. Fast walking and lower intake helped. 5:2 began to take the weight off better. But what gave me my shape back was zumba--not just zumba, but zumba with a teacher who grew up in Hawaii doing hula and constantly moves hips in every movement. The constant hip rotations and hip lifts to the side(standing side crunches, actually) as well as body rolls made an amazing difference!

When you are dancing that way, you are doing crunches every which way. It really works! I'm 65 with some loose skin and a tiny bit of flab still, but I am apron-free!
If you can find a zumba class with those kinds of moves, fantastic. If you can't, try a belly dance class until you learn the moves and then insert them into your zumba or aerobic dance. Last week, I was out in the Arizona desert far from a zumba class but with my ipod with some Best of Simon and Garfunkle just dancing away for an hour without a soul around. I had a blast and got my workout in! Sure as heck beats the gym or an aerobics or calisthenics class!