Walking is easy. It's so easy that no one ever has to teach you how to do it. It's so easy, in fact, that we often pair it with other easy activities--talking, chewing gum--and suggest that if you can't do both simultaneously, you're some sort of insensate clod. So you probably think you've got this walking thing pretty much nailed. As you stroll around the city, worrying about the economy, or the environment, or your next month's rent, you might assume that the one thing you don't need to worry about is the way in which you're strolling around the city.
Well, I'm afraid I have some bad news for you: You walk wrong.
Last year, researchers at the University of the Witwatersrand in Johannesburg, South Africa, published a study titled "Shod Versus Unshod: The Emergence of Forefoot Pathology in Modern Humans?" in the podiatry journal The Foot. The study examined 180 modern humans from three different population groups (Sotho, Zulu, and European), comparing their feet to one another's, as well as to the feet of 2,000-year-old skeletons. The researchers concluded that, prior to the invention of shoes, people had healthier feet. Among the modern subjects, the Zulu population, which often goes barefoot, had the healthiest feet while the Europeans--i.e., the habitual shoe-wearers--had the unhealthiest. One of the lead researchers, Dr. Bernhard Zipfel, when commenting on his findings, lamented that the American Podiatric Medical Association does not "actively encourage outdoor barefoot walking for healthy individuals. This flies in the face of the increasing scientific evidence, including our study, that most of the commercially available footwear is not good for the feet."