eli5: Why are flat feet generally worse than arched feet, when you have more surface area making contact with the ground?

Question

eli5: Why are flat feet generally worse than arched feet, when you have more surface area making contact with the ground?

In: 191

Answer 1

Arches in our feet act like springs. When our feet hit the ground, our heel hits first, then the arches help with the forward “roll” to the ball. When you jump or move fast, the arches absorb energy that would otherwise impact the knees and spine. Flat feet don’t offer that support or rebound. The force travels upwards and can cause pain and other issues.