In this episode, Xavier Bonilla has a dialogue with Daniel Lieberman about the evolutionary history of exercise. They discuss why evolution and adaptation are important to understand the human body, use of energy, myths of sitting, and how much sleep do we really need. They talk about why speed and endurance are important for humans, aggression, walking and running, the active grandparent hypothesis, and many other topics. 
Daniel Lieberman is a paleoanthropologist and is a Professor in the Department of Human Evolutionary Biology, and the Edwin M. Lerner II Professor of Biological Sciences at Harvard University. He is also a member of Department of Organismic and Evolutionary Biology. He has spent his career researching the evolutionary history of the human body, walking and running, and the evolution of the human head. His most recent book, Exercised: Why Something We Never evolved to Do is Healthy and Rewarding, can be found here. You can find his research here.