So why do humans and other great apes walk flat-footed? It is surprisingly energy efficient, a new study suggests. It takes 53 percent more energy for humans to walk on the balls of their feet, and 83 percent more energy to toe-walk. However, the energy savings don't apply to running.

Is it bad to walk flat footed?

Flat feet tend to cause another condition called overpronation, which is when the ankles roll inward while you're walking. This can lead to foot and ankle pain. Because your feet are the basis of support for your entire body, having flat feet and overpronation can cause problems with your spinal alignment.

What happens if you walk flat footed?

Flat feet can affect the alignment of the body when a person is standing, walking, or running. As a result, they can increase the likelihood of pain developing in the hips, knees, and ankles.