Happy Homework 2.0: Effects on 24-hour Movement Behaviours in Children

The purpose of this study is to implement a new version of Happy Homework (HH). Withinthis study the HH app will be trialled, using a cluster‐randomised control trial(cluster‐RCT) design, to determine its effectiveness, feasibility, and acceptability uponchild health outcomes, underpinned by the 24‐hour movement guidelines. HH was previouslyan 8‐week school‐based home‐focussed intervention centred on the promotion of primaryschool children's positive dietary habits, engagement in physical activity (PA) and sleepbehaviours.The cluster‐ RCT will recruit 4 primary schools in South Lanarkshire (2 control and 2intervention), with one class of children from each school recruited (n = 30 approx.).During prior co‐design workshops, and from findings of an ongoing study, stakeholders(teachers, parents, and children) will help determine the duration of the homework tasks,their frequency, their contents, and the design of the app. Additionally, they willprovide opinion on the duration of intervention however, it will be for a minimum of 8weeks and no longer than 12 weeks. As such, the HH app will include up to 12 weeks ofhomework tasks to be completed by the children. Reminders to remain active for theremaining weekdays and weekend days will be included to encourage habitual healthbehaviours. Children will be measured at two points during this period: pre‐intervention(1‐week prior to intervention delivery) and post intervention (1 week after theintervention).Measures within the cluster‐RCT include demographic information, body mass, physicalactivity, sedentary behaviour and sleep.