AI Insight
Human feet have evolved to be significantly stiffer than those of other primates, which reduces midfoot bending during walking. Researchers are investigating whether this structural stiffness evolved specifically to reduce the energy expenditure required for upright bipedal locomotion. This has led to the development of experimental foot-stiffening socks designed to test whether increased foot rigidity can make walking less tiring for humans.
Why it matters
If foot stiffness does reduce walking effort, engineered footwear or inserts could help reduce fatigue in people who walk or stand for extended periods. This research also provides insights into human evolution and the biomechanical adaptations that enabled efficient bipedal walking.
Understand the Science
Human feet are much stiffer than those of other primates, which means they limit midfoot bending during walking. The evolutionary reasons for this are not entirely clear. One idea is that the features that stiffen the foot evolved to make upright walking less effortful.
Source: Foot-stiffening socks could make walking less tiring