Exercised: Why Something We Never Evolved to Do Is Healthy and Rewarding

Do You Get Less Than a Half Hour of Exercise or Physical Activity Each Day?

With the possible exception of laboratory rats on running wheels, we never observe animals doing anything resembling exercise. They hunt, gather, graze, mate, play, fight, and flee, but never do they perform repetitive movements for the sake of “staying in shape.” They move their bodies for pleasure, to explore, or stay alive, but otherwise, they e