Crash dieting is typically the quick reversal of a diet. For instance I eat 500 kcal/day for a week, then then the following month I go back to eating a 500 kca

Crash dieting is typically the quick reversal of a diet. For instance I eat 500 kcal/day for a week, then then the following month I go back to eating a 500 kcal surplus and more than offset my losses. I would not consider 1200 over 3 days (400/day) to be a fast. I would consider 1200 in a month (40/day) to be a fast (I also think that is far to aggressive).