Weight Regain Study After Bariatric Surgery-A Pilot Project

Inclusion Criteria: * Weight regain post-RYGB of at least 5 kg since reaching their weight nadir. * Male or Female age 18 - 65. * Undergone RYGB 12 - 36 month prior. * Ability to read, write and understand English. * Experienced at least a 25% total weight loss since surgery. * BMI at least 27 kg/m. * Weight regain of no more than half of excess body weight. These cases will be referred back to the surgeon. Exclusion Criteria: * Taking Weight-suppressing medication (e.g. phentermine, bupropion) * On medications known to cause weight gain * Change in smoking status with past three months * Change in antidepressant or other psychotropic medication or dosage in past six weeks * Change in psychotherapy status in past six weeks * Current purging behaviors occurring more than once per week over the past six weeks (vomiting or laxative/diuretic use for the purpose of weight loss * Current alcohol abuse or dependence or illicit drug use in past three months * Active bipolar or psychotic spectrum disorder * Current suicidality or homicidality * Severe neuropsychological disease (history of seizure, uncontrolled hypertension * Condition associated with cognitive dysfunction (e.g. Alzheimer's dementia, other neurological conditions) * Medically unstable condition or one which the investigators feel put the participant at risk in the study * Functional limitations-not able to walk 2 block without assistance * Exercise is contra-indicated (e.g., severe cardiovascular disease, uncontrolled hypertension, hematocrit.\<30%, chronic kidney disease, severe pulmonary disease