" While physical activity is a key aspect of the Foundation and has many emotional and physical benefits, people often assume that its most important benefit is something that, ironically, it doesn’t provide: exercise doesn’t promote weight loss. It seems to help people maintain their weight—active people are less likely to gain or regain weight than inactive people—but it’s not associated with weight loss. There are many compelling reasons to exercise, but study after study shows that weight loss isn’t one of them. The way to lose weight is to change eating habits. Third: "

― Gretchen Rubin , Better Than Before: Mastering the Habits of Our Everyday Lives