Gaining Optimism After Weight Loss Surgery (GOALS) II

Inclusion Criteria: * Adult (age 18+) * History of bariatric surgery (gastric bypass or sleeve gastrectomy) at one of two academic medical centers within the past 6-12 months * Interest in increasing physical activity * Low physical activity, defined as \<200 minutes/week self-reported moderate- to-vigorous physical activity * Access to telephone for study sessions * Able to read and speak English Exclusion Criteria: * Cognitive deficits precluding participation or informed consent * Illness likely to lead to death in the next 6 months * Inability to be physically active (e.g., severe arthritis) * Participation in another program targeting physical activity besides their standard offerings at the surgery center. * Severe psychiatric condition limiting ability to participate (e.g., psychosis, active substance use disorder)