Choosing Healthy Activities and Lifestyle Management Through Portal Support

Inclusion Criteria: 1. are ≥ 16 years old 2. are overweight or obese (BMI ≥ 25 kg/m2) 3. have access to the Internet via the computer or use a cellphone with a data-plan access 4. are patients at one of the participating practice sites 5. are willing to accept a random assignment, and 6. are from different population groups (racial / ethnic minority, lower socioeconomic status, or reside in a rural location). Exclusion Criteria: 1. coronary or cerebrovascular disease events or vascular procedures within the past 6 months 2. certain medical conditions that put participants at high risk of adverse events or preclude exercising 3. uncontrolled psychiatric disorders 4. current substance abuse, including heavy alcohol use ≥ 5 drinks on the same occasion for ≥ 5 days in the past 30 days 5. a history of amputation or bariatric surgery or are planning to have bariatric surgery within the next 12 months 6. current weight loss medication use 7. malignancy within the last 5 years (except skin cancer) 8. plans to move out of the area during the next year 9. current participation in another clinical trial 10. pregnancy or breast feeding or are planning to become pregnant within the next 12 months, and 11. instances judged by the investigators' and primary care providers' discretion.