Healthy buddies curriculum delivered by older peers weekly covering three components of healthy living: Physical activity, healthy eating and a healthy body image.

This group received standard school curriculum.

Each week, intermediate students will receive a 45-minute healthy-living lesson plan from their classroom teacher. Later that week, intermediate students will serve as peer mentors ("Buddies"), teaching a 30-minute lesson to their younger students. The Physical activity (i.e."Go Move!") component of the lesson plans includes 30-minutes of structured aerobic fitness sessions, called fitness loops, with the student pairs twice weekly. The dietary ("Go Fuel!") component includes lessons about distinguishing nutritious and from unhealthy (nutrient poor-energy rich) foods and beverages. The body image ("Go Feel Good!") component, the students are taught to value classmates based on individual traits rather than peer influence.

Waist circumference at the top of the iliac crest measured in duplicate with a flexible tape.

Body mass index Z score is calculated from weight/height2 and normalized to population normative data for age (months) and sex.

Objectively measured using daily pedometer counts recorded by teachers.

Questionnaires regarding healthy foods and food frequency.