Preventing avoidable injury is the first obligation of adults who conduct and supervise youth sports events. The law plays only a limited role because lawsuits occur only after the injury. As the behavior of many parents and coaches has deteriorated, national youth sports governing bodies have...

This paper provides a first step to address special considerations for youth in a relatively new area of physical activity research. After reviewing the urgent need for novel approaches to increasing physical activity, the growing interest in the effects of community design is discussed....