Kids this age need physical activity to build strength, coordination, and confidence — and to lay the groundwork for a healthy lifestyle. They're also gaining more control over how active they are.

Unless they find replacement activities, their physical activity levels tend to go way down. Being active is a key part of good health for all school-age kids. Exercise strengthens their muscles and ...

School of Psychology, University of Dundee, Dundee, DD1 4HN, UK; j.booth{at}dundee.ac.uk Background To test for cross-sectional (at age 11) and longitudinal associations between objectively measured ...