Here is a manual treadmill with HIIT programs that helps you push your body. The Assault AirRunner is a portable machine that lets you push yourself as hard as you want as there are no max speed settings. It comes with a console to inform you on time, calories burned, distance, speed, watts, pace, and training programs.
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The treadmill has a steel frame and handrails. It doesn’t require any electricity to work.
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