Behavioural Weight Loss Treatment for Patients with Atrial Fibrillation and Obesity in Cardiac Rehabilitation

12 week outpatient cardiac rehab (CR) program consisting of twice-weekly supervised exercise and risk factor modification (e.g. smoking cessation, support with medication). Concurrently, the patients will attend a weekly behavioural weight loss treatment (BWLT). Weekly goal-setting facilitated by the interventionist will focus on behavioural changes in nutrition and moderate calorie reduction while also emphasizing physical activity consistent with an individualized CR exercise prescription. Patients will track caloric intake, weekly exercise, weekly weight, and success/challenges with other health goals (e.g., challenging negative thoughts, body image, mindful eating, etc.) using a daily health diary. ASPIRE-AF will be delivered virtually to small groups (8-12 patients) by senior PhD students with advanced training in cognitive-behavioural therapy and motivational communication principles.