This project examines the effects of differing schedules of extended care contact following weight loss treatment in order to prevent weight regain following treatment.

Inclusion Criteria:

• At least 21 years-old
• body mass index (BMI) = 28.0 - 45.0 kg/m2
• willing to provide informed consent and accept randomization

Exclusion Criteria:

• BMI >45 kg/m2
• Illnesses requiring medical attention and/or conditions for which weight loss and moderate physical activity would be inadvisable: diabetes not under active treatment, myocardial infarction or cerebrovascular accident within the last six months; unstable angina within the past six months; congestive heart failure; cancer requiring treatment in past five years (exception: non-melanoma skin cancer); serious infectious diseases (e.g., self-reported HIV); chronic hepatitis; cirrhosis; chronic malabsorption syndrome; chronic pancreatitis; chronic lung diseases that limit physical activity; orthopedic injuries or conditions that significantly limit physical activity.
• Conditions or behaviors likely to affect the conduct of the trial: unwilling or unable to give informed consent; unable to read English at the 5th grade level; unwilling to accept random assignment; unwilling or unable to travel to attend intervention (due to distance from clinic, work schedule or other scheduling conflicts); likely to relocate out of the service area in next 18 months.