Treadmills are without a doubt one of the most popular items of sport fitness equipment for home and commercial gym equipment, powered or motorized treadmills use a motor to move a belt, keeping the rate at which you walk, jog or run constant. Many sport fitness equipment motorized treadmills have powered incline adjustments. One of the main advantages of a motorized treadmill is that it's more challenging - it can go faster than you can, so you have to work harder to keep up.