We all need some self-care these days, so if someone growls at you to “take a hike,” definitely take them up on it. After all, it’s one of the healthiest things you can do. Trinity College Dublin neuroscientist Shane O’Mara joins host Krys Boyd to talk about why ditching the car is great for your body, your mood and your connection to your fellow man. His new book is “In Praise of Walking: A New Scientific Exploration.”