"Dr. Irene Davis, a professor of physical therapy at the University of Delaware, conducted controlled experiments measuring impact shock in barefoot and shod runners. She found that, because barefoot runners naturally adopt a fore-foot strike as opposed to the rear-foot strike pattern favored by shod runners, shock to the lower extremities is significantly less in barefoot runners. The shock also decreased in shod runners who adopted a forefoot landing style.
Free from the constraints of shoes, Davis found, musculature in the arches benefits. “When you’re barefoot and you don’t have any support under the arch, especially when you are hiking on uneven terrain, your feet have to work really hard to stabilize you. If you don’t have something underneath supporting it, the foot muscles are going to have to work harder. So I really think that hiking and even just walking barefoot helps to strengthen the muscles of the arch.” In some ways, she says, “We’ve just taught our feet to be lazy.”
That’s something first-time barefoot hikers often discover the next day, especially if they’re used to wearing shoes for most of their walking. Barefoot hiking not only provides exercise for the arches, it also works muscles in the lower extremities in ways that shoes can inhibit."
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