Exercise is a form of hormesis because you're harming yourself in a sense, but then your body responds by activating these ancient systems of healing and repair. functional medicine is about how do we activate these ancient healing systems in our body to do the work? But we are doing everything to impair our healing systems. The best case scenario for aging today is what we're seeing right now in America; the worst case is as you age. And I just got back from Sardinia and the Korea, which are the two of the blue zones, where I was researching my book on longevity. He's got a Pietro who's like 95 years old, upright, super strong. They retired from