A Combined HAPA and mHealth Intervention to Increase Non-Sedentary Behaviours in Office-Working Adults

Participants will receive a one-on-one behavioral counseling session, and planning sheet as reference for developing strategies as part of their Action/Coping Plan. Participants will be asked to form 3-4 actions/coping plans specifying when, where, how, and for how long they would reduce workplace sitting time; and anticipate potential barriers and identify ways they could be overcome. Strategies will focus on increasing break frequency to every 30-45 minutes, achieving a break duration of 2-3 minutes, and increasing standing and light-intensity PA time, during work hours. Participants will receive sedentary behaviour-related text messages twice daily, depending on their preferences and schedule, which will act as mini-booster interventions.