Inclusion Criteria:(a)Web screen: Men or women of any ethnic background; age 18 years or older; body mass index (BMI) 25-39; planning to remain in the area for the next six months; not pregnant or not planning to become pregnant within the next six months; has no history of heart disease, including stroke, heart attack, coronary artery bypass surgery, or balloon angioplasty; not currently under medical care for any of the following conditions: cardiovascular problems (stroke, heart attack, chest pain, bypass surgery, etc.); cancer (except skin cancer); diabetes; respiratory problems (chronic asthma, bronchitis, etc.); or psychiatric condition; not currently taking or stable on medications for vascular problems (such as high blood pressure); able to participate in physical activity; does not meet Diagnostic and Statistical Manual criteria for binge eating; does not have a health condition that requires a special diet; not participating in a weight-loss program; not participating in support groups that focus on weight and eating habits; not taking weight-loss medication; not participating in any other research trial; and willing to be randomly assigned to either intervention.