Originally Posted by
zandoval
It is well known that the longest living humans in the world usually live areas where there is a good diet and up and down walking. As you age you really don't loose your up. You can always stop rest and eventually you will get up there. Down is another matter. Unfortunately as we age we loose our down...
Use it or loose it. The reason people loose their ability to walk down safely is simply because they stopped doing it or are not doing it often enough.