Ted Tanaka, doctor of pediatric medicine in interview also about wearing high heels and their impact on womans body:
For women, it’s hard to escape wearing high heels. Are they really that bad for the feet?
When you raise your heels more than two inches off the ground, the biomechanics of the whole body dramatically change. You force more weight on the balls of your feet, which adds more pressure onto joints and nerves and than changes the pull of the tendons and muscles. Wearing high heels continually over a matter of years can actually cause the calf muscle to shorten and tighten, which can cause arch cramps, achilles tendinitis and knee and hip joint pain. The back can become tired and sore because your muscles will try to keep you in balance.
So you would say don’t wear them?
Not higher than two inches. They look nice, but they aren’t very functional. They’re made purely for for cosmetic reasons – not long walks.