Old loop: Fat runs in my family, so why bother exercising?
Switch to... I can't change my DNA, but I can change my fate.
Here's How: "Genetics helps determine your natural weight range, but you have some control over where you fall within that range," says Edward Abramson, PhD, an expert on obesity, dieting, and weight disorders and the author of Body Intelligence. Rather than aiming for a size 2, aim for health: If being overweight is a family trait, diabetes, heart disease, and other obesity-related illnesses could be, too, Schwartz says. Walk to the grocery store, choose the stairs over the escalator, and take good care of the body you were born with. "It's important to distinguish between body size and body health," she says. "Research shows that people who are overweight and physically fit can live longer than people who are ideal weight and not physically fit."