The purpose of this study is to learn whether overweight children who participate in an after school team sports program improve their health as much as overweight children in a more traditional health education program.

There is an urgent need for feasible, effective, and cost-efficient programs to help overweight children control their weight. To start to address this unmet need, we are evaluating after school team sports as an intervention for reducing weight gain among low-income and at-risk of being overweight, and overweight children. After school sports programs may be generalizable, motivating, and cost-efficient interventions for long-term weight control among at-risk and overweight children. The infrastructure needed to provide such programs already exists in most communities. In contrast, more traditional, medically- and behaviorally-oriented treatment programs are expensive, generally not very effective, often inconvenient, and not available in most communities. While children involved in team sports tend to be more physically fit than their uninvolved peers, team sports has not yet been tested as a method to increase involvement of at-risk and overweight children in regular physical activity. As an added bonus, these sports programs can displace typical after school television viewing and snacking. Team sports is a potentially innovative and high impact approach for intervening with at-risk and overweight children, as it may provide an opportunity to reduce weight gain while increasing social interaction and self-esteem. If our proposed research finds that team sports are an efficacious intervention for reducing weight gain among low-income, at-risk and overweight children, it is an intervention approach that could be rapidly diffused and tested for effectiveness. The policy implications of these findings would be great, encouraging expanded access to team sports programs to a population that has not been previously targeted or included.

We propose a 1 year randomized controlled trial comparing weight changes among low-income, overweight children randomized to participate in an after school team sports program versus a traditional weight control/health education program.

Inclusion Criteria:

• In the participating school district
• 8-11.9 years old
• BMI >= 85th percentile for age and sex on the 2000 Centers for Disease Control (CDC) growth charts
• Clearance to participate from medical care provider
• Willing, able, and available to attend an after school program
• Not planning to move from school district within the next 12 months
• Speaks and reads English or Spanish
• Child has not repeated more than one grade in school
• Completion of signed active informed consent (parent or guardian) and assent (child) to participate, which includes a description of the two interventions and requires their willingness to be randomized.

Exclusion Criteria:

The investigators' goal is to be as inclusive as possible, however, children will not be eligible to participate if they:

• Have a condition that limits their participation in physical activity enough that they are not able to participate in Physical Education at school (e.g. significant structural heart disease)
• Have been diagnosed with a chronic illness that affects their growth and/or weight (e.g. type 1 diabetes, hypothyroidism, inflammatory bowel disease)
• Have taken systemic steroids (oral, intravenous, or intramuscular) for a period of more than 21 days in the past year
• Are taking other medications affecting their growth and/or weight [e.g. methylphenidate hydrochloride (HCL)]
• Are pregnant
• Are unable to complete the informed consent process