Friday, August 23, 2013
Do we need to wear shoes ? :New study
Scientists from the Institute of Ageing and Chronic Disease at the University of Liverpool have studied more than 25,000 steps made by volunteers on a pressure-sensitive treadmill to investigate how evolution has shaped the human foot. They discovered human feet may not have evolved as the feet of other ground species. The familiar model of a human footstep starts with pressure at the heel that quickly runs along the outer edge of the sole of the foot before spreading inward across the ball of the foot, and eventually pushing off with the toes. The arch on the inner side of the foot flexes, thanks to ligaments and muscles that allow weight transference. By comparison the lateral arch of the human foot has always been thought to be rigid but researchers found the healthy human foot is actually much more flexible than previously thought. In the paper published in the journal Proceedings of the Royal Society B: Biological Science researchers extrapolated specialist footwear may not be as crucial to support the kinetic action of the human foot as has previously been thought. The next part of the study will be to test this theory.
Karl T. Bates, David Collins, Russell Savage, Juliet McClymont, Emma Webster, Todd C. Pataky, Kristiaan D'Aout, William I. Sellers, Matthew R. Bennett and Robin H. Crompton 2013 The evolution of compliance in the human lateral mid-foot Proc. R. Soc. B