July 19, 2010 7:10 pm Doug E. Fresh Gives Lessons in Health Doug E. Fresh taught 200 Washington, D.C., children about heart health with a hip-hop lesson. Local 2:14 Opioid crisis: National drug take back day on Saturday 2:55 Concussion treatment: Returning to school and limiting screen time may help, study finds 2:39 What to know about ADHD medication and pregnancy 2:08 How to pick the best running shoes for outdoor exercise 3:41 Nail biting: A psychiatrist shares tips