I wrongly assumed that because it had the Gold's Gym brand new on the label that I was making a high quality purchase. Sadly, I was mistaken. Lesson learned; I did not keep my Gold's Gym 450 Treadmill for very long. This treadmill seems lightweight, which at first appears to be a good thing. However, when you consider the force with which was my body was pounding down as I ran, especially when sprinting, lightweight was the opposite of what I needed. For a light to moderate jog, which is the test I gave it in the store, the treadmill was fine. So, for those who merely intend to walk, this is a fine purchase. However, I use my treadmill for interval running when the weather outside is either too hot or too cold (or too polluted). As soon as I got to a running speed, I question the integrity of the treadmill and its ability to stay intact as I began to run faster. It certainly could not handle my sprints and made it sound as though a herd of elephants were coming through.