I usually run on treadmills at the gym and it wasn't until I started walking on the sidewalk that my shoes didn't fit. I had a bit of ankle pain and decided to buy some shoes based on research and I really didn't want to break the bank as I don't consider myself a runner. The difference is extraordinary. My original shoes are also popular brand sneakers, but really bought because of the price. They are perfect for any athletic shoe. I will keep my old running shoes for general fitness but will only use Saucony for running.