Adapting an Evidenced-based Weight Management Intervention and Testing Strategies to Increase Implementation in Community Mental Health Programs

Coaches - * Adult staff or peer at community mental health program * Willing and able to participate in training and delivery of intervention Consumers- Inclusion Criteria: * Age 18 and older * Enrolled in a psychiatric rehabilitation program * BMI ≥ 25 kg/m2 * Willing to make changes in diet and exercise to lose weight * Willing to attend the ACHIEVE group sessions virtually or in-person at least once per week * Ability to use a computer or tablet * Competent and willing to give informed oral consent * Completion of baseline data collection Exclusion Criteria: * Any underlying medical conditions that could seriously reduce life expectancy, ability to participate in the study, or for which dietary change/physical activity/weight loss may be contraindicated e.g., Lung disease requiring supplemental oxygen Liver failure History of anorexia nervosa or bulimia Stage V kidney disease on dialysis Cardiovascular event in the last 6 months including unstable angina, myocardial infarction, congestive heart failure, transient ischemic attack, or stroke * Insulin dependent diabetes * Inability to walk unassisted (e.g., uses a cane, walker, etc) * Pregnant, breastfeeding, or planning a pregnancy during study period * Prior or planned bariatric surgery * Use of a prescription anti-obesity medication or over-the-counter orlistat within the past 3 months * Self-reported weight loss of \>20 lbs in the last 3 months * Active substance use disorder, alcohol use disorder, or problem drinking (more than 14 drinks per week for women, more than 21 drinks per week for men) * Planning to leave mental health program or move out of geographic area within 12 months * Weight greater than 440 pounds (so as not to exceed capacity of study scale) * Investigator judgment (e.g., for concerns over safety, adherence or follow-up)