Rationale: From 2015-2020, the 'Healthy Primary School of the Future' intervention took place in Limburg, the Netherlands. The school environment of four primary schools changed. Two schools became 'Healthy Primary Schools of the Future'; providing their students with a healthy lunch and structured physical activity (PA) sessions during lunch time breaks. Two other 'Physical Activity Schools' only implemented the structured PA sessions. Interim analyses showed promising effects of the intervention; at two-year-follow-up, the study showed a significant decrease in BMI z-score of children in the 'Healthy Primary Schools of the Future' as compared with children in control schools. Also, positive intervention effects on dietary and PA behaviours were observed. Following these promising results, childcare centres of educational board Prisma have expressed their interest in implementing changes fitting the 'Healthy Primary School of the Future' initiative. However, this is more complex than it seems to be, as budget to implement changes is lower than in the original trial, and all childcare centres have a unique context. Therefore, there is a need to investigate how 'Healthy Primary School of the Future' can successfully be implemented in various, real-life school-settings. It is hypothesised that to maximise implementation and sustainability, each childcare centre will need to put together a set of changes and interventions which fit the context and needs of all stakeholders involved (e.g., the school board, teachers, parents and children).~Objective: The main objective is to study the implementation process of 'Healthy Childcare Centre of the Future' in different school-contexts and develop guidelines that can be used to facilitate widespread dissemination of the initiative. Secondary objectives include evaluating the effects of the 'Healthy Childcare Centre of the Future' on children's BMI z-score, general health, dietary and PA behaviours and school well-being. To reach these objectives, a process evaluation, effect evaluation and cost-effectiveness evaluation will be executed.~Study design: A non-randomised, non-controlled, observational study design. Study population: Children in study years four to six (at baseline) of twelve childcare centres located in Limburg, the Netherlands.~Main parameters/endpoints: The main study parameter of the effect evaluation is the change in absolute BMI z-score, which will be compared between the childcare centres categorised based on their degree of implementation (using categories based on the Diffusion of Innovations Theory).~Methods: Data will be collected in the form of questionnaires (parents, children, teachers/pedagogical employees, directors), anthropometric measurements (children), interviews (teachers/pedagogical employees, directors), observations and analyses of minutes of meetings.~Nature and extend of the burden and risks associated with participation: No intervention is allocated in this study other than activities planned by childcare centres in accordance with wishes and needs of childcare centre staff and parents. All outcome measures are non-invasive. The measurement protocol was designed while taking into account both a minimal burden for participants and a relevant scientific output for stakeholders (e.g., school board, teachers, parents/caregivers and children). Burden of participants is minimalised by incorporating most measurements in the regular school day.
Rationale: In 2015-2020, the Dutch 'Healthy Primary School of the Future' intervention took place. Two schools became 'Healthy Primary Schools of the Future'; providing a healthy lunch and structured physical activity (PA) sessions. Two other 'Physical Activity Schools' only implemented the PA sessions. The intervention showed promising effects on children's BMI z-score and dietary and PA behaviours. Following these promising results, childcare centres of educational board Prisma have expressed their interest in implementing changes fitting the 'Healthy Primary School of the Future'. However, this is more complex than it seems to be, as budget to implement changes is lower and all childcare centres have a unique context. Therefore, there is a need to investigate how 'Healthy Primary School of the Future' can successfully be implemented in various, real-life school-settings. It is hypothesised that to maximise implementation and sustainability, each childcare centre will need to put together a set of changes and interventions which fit the context and needs of all stakeholders involved. No intervention is allocated in this study other than activities planned by childcare centres in accordance with wishes and needs of stakeholders.~Objective: To study the implementation of 'Healthy Childcare Centre of the Future' in different school-contexts and develop guidelines that can be used to facilitate widespread dissemination of the initiative. Secondary objectives include evaluating the initiative's effects on children's BMI z-score, general health, dietary and PA behaviours and school well-being. To reach these objectives, a process evaluation, effect evaluation and cost-effectiveness evaluation will be executed. Data will be collected using questionnaires (parents, children, teachers, directors), anthropometric measures (children), interviews (teachers, directors), observations and analyses of minutes of meetings.