Glad to hear you are doing so well with your recovery and reconstruction!
From my study of nutrition and exercise, and in my personal experience, the stomach responds best to aerobic exercise, even if it's just walking--30-60 minutes/day if you can manage it--and to a healthful diet with lots of fiber ( whole grain breads and cereals, fruits and veggies) and low-fat dairy and other protein sources (mostly poultry and fish, and limiting red meat to once or twice a week). Prevention magazine often has good articles about healthful and successful weight-loss plans, including the"flat belly" diet.
There are other exercises that can help the stomach, thighs, and over-all weight loss, such as weight-training to preserve or build muscle tissue, which burns more calories that fat, and leads to a better shape (think Michelle Obama's arms!). But walking is something that is inexpensive, doesn't require equipment (other than good walking shoes), can be done either alone or with others, and can be done by people at all levels of fitness, and even right after surgery. (Years ago, after I had abdominal surgery, my surgeon told me the best thing I could do to aid my recovery was to walk a couple of miles a day. I started walking while I was still in the hospital, and began the two miles per day as soon as I was discharged. I was able to return to work within 10 days, instead of the usual 6 weeks.)
Try these suggestions, and I bet within a month you'll see enough improvement that you will want to continue.
Please write again and let us know how it's going.
Thanks for sharing your experience. I sent a msg to your inbox.