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Getting Your Feet Wet With a Non Electric Treadmill If you want to test your feet with a treadmill that is not motorized take a look at the NordicTrack Commercial X22i. This model is a hybrid that comes with an electric motor and an option for manual operation. Flat manual treadmills help you develop a correct running technique by forcing you to land precisely beneath your hips and engage the right muscles. They are also more responsive to changes in speed and therefore are great for HIIT workouts. Manual T