I've read all the stickies and yada yada, but while watching The Biggest Loser last tuesday, I heard one of the trainers tell someone to make sure they are eating their full 1700 calories. These are big dudes and they work out like 4hrs a day there. How can 1700 calories be enough for these guys? They lose big weight every week but aren't they in starvation mode? How does this happen?