Nudging interventions to improve children's sleep, physical activity and sedentary behavior: A scoping review

In recent years, nudges to improve health behaviors have generated growing public health interest, as a promising and inexpensive intervention approach. Most nudging intervention reviews have examined nudges targeting adults, with few focusing on children. We aimed to review the literature on nudges designed to improve children's sedentary behaviors, physical activity, and sleep, and to identify existing gaps in scientific knowledge. We screened the literature for experimental and quasi-experimental studies written in French or English reporting on nudging interventions designed to improve physical activity, sedentary or sleep behavior in children aged 2-12. No setting restrictions were applied. Data extracted included setting, population, health behavior and method of measurement (reported vs measured or observed). The search was performed in June 2021 and yielded 3768 results, of which 17 articles met inclusion criteria. Most included studies aimed to improve physical activity, seven targeted sedentary behavior and only one was directed at sleep. Home or school settings were the most common. Most studies were RCTs, reported a positive effect and presented multicomponent interventions, including both nudges and non-nudge aspects. Interventions targeting the decision structure were the least represented type of nudges among our sample. Our results show a paucity of research investigating nudges aimed at improving pediatric physical activity, sedentary behavior, and sleep. Interventions using nudges alone were even fewer, highlighting the need to study this promising type of intervention to improve lifestyle behaviors of children.