It's a common misconception that we may curl up on a fetal position and feel lethargic and weak when we 'diet'. On some programs, this may be the case, however, the program is structured precisely to create changes in the way your metabolism functions, so you will, in fact, have more energy to exercise. With the intermittent nature of the scheduling and specific timing of meals, you will experience (by around day 5) a boost in your metabolic rate and growth hormone output, giving you and almost euphoric feeling. Your blood sugar will be more stable than ever as your body switches over to burning stored body fat as its primary fuel source. The result - fat loss and endless energy!