Someone once told me that your body is "programmed" to be a certain weight; and, aside from genetics, when you remain at a given bf% for a long period of time, your body is "programmed" at that bf%.
If you loose a sizeable amount of fat, your body will try to gain it back, in an effort to return to it's homeostasis.
It takes about 6 months of maintaining your weight loss, to "re-set" your body at that bf%.
Is there any truth to this... or is it a bunch of B.S.