(the following article was written by nutritionist Sarah Rowe and posted here with her permission)
How to Be Lean for Life
Your body wants to be lean. Excess weight burdens your body and causes hormonal problems. Your body would much rather be healthy, energetic, and vibrant. Unfortunately, if you try to get there too fast, it will shock your system and your body will fight you in your efforts.
Dieting tells your body food is scarce and that it needs to squeeze every calorie out of the food you eat. Because it does not know when the next meal is coming, it enters into a defensive mode and begins slowing your metabolism. This is turn catalyzes all sorts of changes in your body for the purpose of conserving energy.