With the emergence of barefoot running, the sport suddenly is red hot again. But barefoot or not, are human bodies really born to run? We'll check in on the science or runner's high this hour, and try to unlock the secrets of the Kenyans - the fastest people on earth. Also, Olympic medalist John Carlos remembers the moment that turned him into a cultural icon at the '68 Games.
The '68 Olympic games changed everything for John Carlos. He and fellow runner Tommie Smith raised their fists in the black power salute on the podium in a moment that became known as the most defiant and controversial in Olympics history.
Most of us want to exercise smart, to get the most bang for our buck in the least amount of time. Gretchen Reynolds writes the Phys Ed column for the New York Times. She’s compiled the latest in exercise science into the book “The First 20 Minutes" to help keep our work-outs working.