I've tried all sorts of sneaker/tennis/running shoes and it never seems to change. I can cover (because I used to do this with a pedometer, so I know) 25-35 miles in a 17 hour shift. A lot of that is indoors, up stairs and all. But the outdoor stuff, the truck ramps, the street and all, it's hard on shoes because the shoes are taking a lot of the weight and stopping energy. Add to that the fact that I walk or bike most everywhere and that's not a recipe for longevity. And though often they will blow out at the seams around the ball of the foot, most of the time I just plain use out all the rubber/plastic whatever in the sole, which is crappy to find out if you don't know before it rains.