Physical activity is absolutely essential to maintain good health…  but you need checks in the system to make sure it’s done safely.  That’s where the CDC’s Heads Up: Concussion in Youth Sports on-line training comes in.  It’s is a free, online course available to coaches, parents, and others designed to help keep athletes safe from concussion. It features graphics, interactive exercises, and storytelling to help folks prevent concussions, to recognize them when they happen, and how to effectively respond.