Ninety percent of this game is half mental.--Yogi Berra
At last, we're ready to turn to the task of losing weight. We've studied the mechanics of the body to learn how it gains and loses weight. We've modeled the body as a feedback system to understand why we have trouble controlling our weight while others don't. We've found a way, starting from simple daily weight measurements, to determine the true course of the body's weight and the fragile balance between the calories that go in to the rubber bag and what gets burned. Engineering has given us the tools of weight control; we possess a power we didn't before. Now we must grasp those tools and use that power to manage a successful program of weight loss and permanent weight control.