If we are born to walk and run, why do most of us take it easy whenever possible? And how do we make sense of all the conflicting, confusing, anxiety-provoking information about rest, physical activity and exercise? Professor Daniel Lieberman, Human Evolutionary Biologist at Harvard University has written a new book entitled _Exercised: Why Something We Never Evolved to Do Is Healthy and Rewarding._ Listen to this conversation exploring the role of exercise in our lives. Image: book cover
**Daniel E. Lieberman** is a Human Evolutionary Biologist and Professor at Harvard University. He has written a book entitled "Exercised: Why Something We Never Evolved to Do Is Healthy and Rewarding."" He studies and teaches how and why the human body looks and functions the way it does. Lieberman has long been fascinated by the evolution of the human head but his main focus is currently on the evolution of human physical activity.