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How Does a Non Electric Treadmill Work? A manual treadmill can also be known as a self-propelled or flat-bed treadmill. It uses your body weight to move the belt. It does not require an electrical outlet and is simple to store. Studies have demonstrated that running on a treadmill without motors more closely simulates outdoor running. This is especially applicable to HIIT training. It has a curving belt A curved manual treadmi