It is desinged for forefoot runner. You can literally feel the body will tend to lean forward as you do feel the sorta "push" by the mobium x-ban on the bottom of the shoes. I had a serious muscle cramp along sides on the bottom of both feet. Thus I reckon shoes like this equires a good amount of strength and athletic ability. If you are not a forefoot runner, then save the money and go get somthing else. Hope this helps