| Inclusion criteria for Phase II |
| Weight loss of at least 4 kg during Phase I |
| Willing not to use weight loss medications for the duration of the trial |
| Willing to be randomized to maintenance phase |
| Able and willing to give informed consent and participate in the interventions |
| Exclusion criteria for Phase II |
| Medical History |
| Contraindication to weight loss (e.g., malignancy or other serious illness) |
| Cardiovascular event since entry |
| Current symptoms of angina, unless we have both physician permission and a non-positive stress test or other diagnostic test for CAD. |
| Evidence of active cancer diagnosis (except for non-melanoma skin cancer) or treatment in past 2 years, defined as any diagnosis or any treatment within the past 2 years |
| Self-reported history of renal disease (other than kidney stones) since entry |
| Psychiatric hospitalization since entry |
| Gastric bypass surgery or fundoplication for obesity since entry, or scheduled surgery for this purpose |
| Liposuction since entry, or scheduled liposuction |
| Medications |
| Use of prescription weight loss medications |
| Current use of medications for treatment of psychosis or manic-depressive illness |
| Current use of medication for the treatment of diabetes |
| Other |
| Planning to leave the area within 30 months |
| Pregnant, breast feeding, or planning pregnancy prior to the end of participation |
| Weight Loss Maintenance Trial staff member or household member of a Weight Loss Maintenance Trial staff person |
