great article

About 20% of adults have flat feet. A small subset of the population suffers from hereditary flat foot, but most of it is developed. Very few of us are actually born with flat foot. In this post I’ll explore what you can do to avoid flat feet in the first place, and if you already have them whether it is possible to reverse the damage.

Foot A is that of a child who has worn shoes for a mere three months, while Foot B is that of an adult who’s gone barefoot his whole life. Three months was all it took to drastically shape the child’s feet. Already his big toe is turning inward.

In the end, Hoffman concluded that of the “one hundred and eighty-six pairs of primitive feet examined, [he] did not find a single foot associated with the symptoms of weakness so common in adult shoe-wearing feet, which are weakened by the restraint the shoe exerts over function.” He also noticed that foot development was remarkably similar, in all populations, up until the introduction of foot wear. Shoes, it seems, have an undeniable ability to alter one’s natural foot structure.