Active Breaks in School: The Pause, Learn, and Activate Yourself (PLAY) Cluster-Randomized Controlled Trial

Many children spend a large part of the school day sitting, which can limit their opportunities to be physically active. Regular physical activity is important for children's physical health, mental well-being, and positive attitudes toward movement. Schools represent an ideal setting to promote healthy behaviors, as they reach nearly all children on a daily basis.

This study aims to evaluate the effects of short, classroom-based Active Breaks on children attending primary school. Active Breaks are brief periods of physical activity integrated into regular classroom lessons. These activities are designed to be fun, safe, and easy to perform in the classroom, without reducing academic teaching time.

The main goal of the study is to assess whether participating in Active Breaks improves children's enjoyment of physical activity. Enjoyment is an important factor because children who find physical activity enjoyable are more likely to stay active over time. The study also examines whether Active Breaks influence physical activity levels, basic motor skills, physical fitness perception, attention and executive functions, vitality, and quality of life.

The intervention lasts 12 weeks and is carried out during the normal school timetable. In the intervention group, children perform one Active Break during each school hour. Each break lasts approximately 5 minutes and includes playful aerobic and strength-based movements that require little or no equipment. The activities are guided by classroom teachers, who receive specific training and materials before the start of the study. A comparison group continues with the usual classroom routine without Active Breaks.

Participation in the study is voluntary. Parents or legal guardians provide written informed consent, and children provide verbal assent. All activities are appropriate for primary school children and are conducted in a safe and supervised environment. Children may withdraw from the study at any time without any consequences.

The results of this study may help schools and policymakers understand whether simple, low-cost strategies such as Active Breaks can promote healthier and more active school days for children.