The Importance of Exercise

Hippocrates said that walking is man's best medicine. The human body is really designed to walk, you know, miles a day as hunter gathers. We can run when necessary, but walking is our preferred most efficient gate. And crucially, if you say, break a rib pain let you know when it's healed and you're ready to go again. It's a very exquisitely tuned on board diagnostic system that lets you control a very complicated machine without even being able to read or write.