January 15, 2012 11:18 am From the 2012 Health and Fitness Expo: Day 2 News4’s Doreen Gentzler lays out some of the fun activities available at Day 2 of the NBC4 Health and Fitness Expo 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