An Innovative Care Model Integrating Mobile Health Support to Promote Weight Management in Adults With Overweight or Obesity

"Participants will complete four 7-day EMA sessions, reporting their diet for 3 days and physical activity for 4 days by completing five brief daily mobile app surveys (under 2 minutes each), using a 5-digit case number for privacy. The app automatically retrieves Fitbit data-such as step count, moderate-to-vigorous physical activity (MVPA), sedentary behavior, and heart rate- and sends timely reminders if surveys are missed.~Within one week after the first EMA session, participants will attend a nurse- led counseling session using the 5A Model (Assess, Advise, Agree, Assist, Arrange), providing tailored feedback based on EMA and Fitbit data, and addressing barriers to change. This is followed by risk-based coaching from a dietitian and fitness instructor, with individualized diet and exercise plans. Between sessions, participants receive ongoing support, including instant reminder messaging and weekly motivational messages to encourage healthy behaviors."

Participants will not receive risk-stratified services but will be provided with informational leaflets offering general advice on maintaining a healthy diet, regular exercise, smoking cessation, and alcohol cessation.