Well, one good way to stop losing weight is to stop exercising! LOL
I know most other zoners will say that exercise is not required for fat loss in the Zone, but I have such a narrow window of opportunity, being of shorter stature, that I have only had success losing weight when I combine a healthy diet with exercise. I had been riding bike all summer and slowly trimming the fat off, but now that it is cool outside and the evenings are shorter, I am finding less time to ride. Thus, fat loss is slowed down again. Just gotta get back into my "winter" routine!