I've been wondering how much time I should focus on situps and exercises to build muscle in my midsection. I'd love to have strong muscles there, but I have a considerable amount of fat to burn first. For those who don't know, I just had a kidney transplant after doing peritoneal dialysis for a few years. This type of dialysis really stretches the stomach (not sure if that counts stretching muscles out as well), so I've got work to do. Just looking for advice/input on (1) good ways to burn stomach fat, (2) on ways to build stomach muscle/tone, and (3) on whether to work on both simultaneously (vs. waiting until the weight is gone before building more muscle).