The founder of the 17 Day Diet says that's what makes his formula work. Your body doesn't have time to get accustomed to it and the constant change is why it's effective.

Stands to reason, though, because I noticed that when I hit a plateau (usually after losing 20-25 pounds) if I'd just take one day and eat whatever I wanted that usually "jump started" the losing process again.

Makes sense to me that it would work for exercise, too. I wonder if I could do the exercises? My balance is terrible. I'm going to check it out, though. I need to exercise but just haven't found what works for me yet.