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Treadmill Machine Without Electricity A treadmill is a great exercise machine that can be used for running, walking and even for interval training. This treadmill has an unidirectional belt, incline settings, and a screen to show the time, speed, distance and calories burned. It also has a cord that is hard to reach for children, which can help prevent them from accidentally strangling themselves. This is a problem motorized treadmills are prone to. Safety Feature