In an effort to address the physical inactivity crisis among adolescents, the present study will examine the efficacy of using an already established Web-based social networking platform (i.e., Facebook) to deliver a physical activity intervention to adolescents.

In an effort to address the physical inactivity crisis among adolescents, the present study will examine the efficacy of using an already established Web-based social networking platform (i.e., Facebook) to deliver a physical activity intervention to adolescents. The primary objectives of this trial are to 1) test the efficacy of a social media-delivered physical activity program for increasing lifestyle physical activity in adolescents, and 2) determine the effectiveness of a physical activity intervention based on social cognitive principles in comparison to a simple information-based physical activity condition. Additional objectives include an examination of how program participation may influence psychosocial health and how these changes affect physical activity patterns in youth.

Inclusion Criteria:

• Must be between 13-15 years of age
• Must not regularly meet nor exceed 60 minutes of daily physical activity
• Must have access to computer with Internet connection at home
• Must reside in Champaign County

Exclusion Criteria:

• Physical limitations that may prevent regular participation in physical activity or may inadvertently exacerbate any per-existing medical condition