You know those expensive Nikes buy to help you run better? Harvard says to toss them out!

Daniel E. Lieberman, Professor of Human Evolutionary Biology at Harvard, studies what makes the body works as it does. He's reviewed dozens of studies on how people run, and taken hours of video of people running, both with and without footwear. His conclusion may not make the sports shoe industry happy - scientifically speaking, less is more for runners.