Move@NUS: a Digital Intervention Cohort Promoting Healthy Movement Behaviours

Good overall mental and physical health and wellbeing can be promoted by engaging inhealthy movement behaviours ‐ getting adequate sleep, being physically active, andminimising recreational time spent watching a screen or being sedentary. The objectivesof this study are to determine the feasibility of: ‐ establishing a digital cohort study and continuously monitoring health behavioursand wellbeing (and related factors) for 6 months, and ‐ rapidly evaluating the effects of ecological momentary interventions (EMIs;small‐scale interventions that provide support in real‐time, delivered via thesmartwatch and app) for promoting healthy movement behaviours via a series ofembedded RCTs.The investigators will enrol up to 150 first‐year university students into an innovativehybrid study that combines a digital cohort with embedded randomised controlled trials(RCTs). The digital cohort consists of 6 months of continuous observations of movementbehaviours, wellbeing, and related factors via a smartwatch (Apple Watch) and repeatedbursts of smartphone‐based ecological momentary assessment (EMA) surveys. Throughout the6‐month monitoring period, participants are enrolled in 3 embedded RCTs evaluating theeffects of EMIs that, in turn, target sleep, physical activity, and smartphone‐basedrecreational screentime. For each embedded‐RCT we assess engagement and acceptabilityoutcomes (e.g., whether a push notification is opened, whether it is responded to), andpreliminary efficacy (i.e., whether there is a between group difference in the targetbehaviour from pre‐ to post‐intervention). Participants also complete traditionalquestionnaires at baseline, 3‐, and 6‐month follow‐up.