@Marvellousflowers emmmmmmmmmmmmmmmmmmmm have you actually read it?
Your heredity and your environment-starting back at the moment of your conception-determine your set point.Over the long term, excess food and insufficient exercise will override your body's natural tendency to stay at its set point and lead to a higher, less healthy set point.
A slow, gradual weight gain, (a 20-pound weight gain over several decades) will fool your body into thinking that your set point should be higher -and in fact, that does reset your set point. Then, when you try to lose weight, your body defends that higher weight, making weight loss more difficult.
But just as it's possible to reset your set point to a higher point, it's also possible to lower it. The secret is to work with, not against, your body's natural tendencies and lose weight slowly, one silhouette at a time.
Internal Controls vs. Environmental Factors
There are internal controls that govern this complex process. These controls include a tiny structure deep within the brain, nerves that run between the brain and stomach, and a host of hormones, but ultimately, your behavior-how you respond to the environment-trumps your physiology, or your body's inner workings.
Oversized portions of high-calorie (and often inexpensive) foods are readily available, day and night.
Modern conveniences -everything from electric toothbrushes to leaf-blowers to cars-mean we don't have as many opportunities to exercise.