terayon! my foot training was because I was born flat footed and when I was 4 steps were taken to rectify my fallen arches. I was made to wear some Dolomite hill walking boots which had formers inside for nearly 2 years so that my foot would be a slightly more normal shape. This had the knock on effect of walking me walk more on the balls of my feet and hence I find heels are easier and more comfortable than flat shoes.
Hope that's cleared the mystery