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Treadmill Machine Without Electricity A treadmill is an excellent exercise machine that can be used for running, walking or even interval training. The treadmill has a flat belt with incline settings, and a screen that displays speed, time as well as distance and calories burned. It also has an extension cord that is difficult to reach for children, which could keep them from accidentally strangling themselves. This is a problem that motorized treadmills can be prone to. Safety Features A treadmill is a huge and heavy machine that can be moved at spe