in my experience, i always did a 1 day fast after several weeks of healthy food choices at an aggressively low calorie intake. typically my good dieting habit would end within several days of the full-day fast. i sorta attribute the problem to my pushing the diet too hard, restricting calories too much, & going to a full-day fast is the epitome of over-doing the dieting. my body stops losing weight until i cave in & have a day off the diet, & suddenly i gain back 10 pounds, & find myself unable to get back on the wagon. game over.
I like IF much better, every morning my stomach is empty while I work a physically laborious job & feel much more in tune with my body chemistry, & mental discipline.
