August 3, 2012 11:12 am Extreme Exercise: The Dangers of Workout Addiction News4’s Doreen Gentzler explores why so many people are forming extreme exercise habits. 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