RecruitingBehavioural interventionDefy The Odds: Exercise Forecasting and Motivation Strategies for Prolonged-Sitting JobsThis study aims to see if a new approach called "Exercise Forecasting" can help people with jobs with a lot of sitting get more active. It also tests if using this method in personal motivational messages makes it easier for them to exercise. The main questions it aims to answer are: * Can "Exercise Forecasting" be used effectively for people in jobs requiring long periods of sitting? * Do these tailored, proactive messages encourage people to exercise more and sit less? Participants will: * Wear the provided smartwatch and answer two questions per day * Receive customized motivational messages