This isn't something I live with so I'm going on faint memory. You may want to do your own research.

I thought I had read that people who carry most of their weight in the belly have some hormonal imbalance that also predisposes them to more cardiac trouble? And that one of the contributors was insulin, and if A & B are true, then Atkins is one of the more efficient remedies because it will get the insulin straightened out, and after that, many of the other hormones fall into place.

However, 10# may be more of a cosmetic issue than a metabolic problem, per se, and I'd suspect a lot of crunches coupled with cardio will do more good than a week-long change, which can't affect much in terms of lasting changes in body mass.