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.

But more casual athletes may lose interest and decide to quit teams and leagues. Unless they find replacement activities, their physical activity levels tend to go way down. Being active is a key part ...

Among males, health benefits were detected from very low levels of physical activity and the magnitude of the relationship ... assessing if this relationship differs according to age and sex. The ...

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 ...