Muscle force through the Achilles tendon provides the “spring in our step.” Forces through the tendon are huge even with routine walking, so it’s no wonder that ruptures of the Achilles tendon are common.
Source: The New York Times Written By: Gina Kolata
A recent essay in The New England Journal of Medicine was titled "Heart and Sole — Of Metatarsals, Meaning and Medicine." I had to read it. It's not often you come across a reflection on metatarsal fractures, though they are common. I had just recovered from breaking my fifth metatarsal, the slender bone on the outside edge of the foot, so I was curious.
On the day before the 2016 New York City Marathon, Dr. Justin Greisberg delivered a lecture on the evolution of the human foot at the 2016 Regional Meeting of the American Association of Anatomists. In addition to discussing the evolutionary adaptations required for walking and running upright, Dr. Greisberg discussed more modern trends in barefoot running and issues affecting endurance runners.
Barefoot running has become a popular topic in recent years. Although participants run entirely "unshod" in its truest form, shoe manufacturers have developed minimalist "shoes" (more like gloves for the feet) to protect the feet. To some, barefoot exercise is a chance to get closer to our primitive selves, a chance to get back to nature. To a few scientists, barefoot running is a way to take advantage of how the human foot has evolved. The actual science behind the argument for unshod running is weak, though.