If you like to run, this machine is like running on air, but with a powerful amount of punch. This treadmill is like none you have ever known, burning up to 30% more calories than the average motorized version and built with intense training in mind. The AirRunner runs on your energy, with zero electrical consumption and a low carbon footprint. You'll be amazed at what a hardcore workout can come from the power of your own two feet. The AirRunner is a lightweight treadmill that is easy to move with transport wheels and handle. The function of the Air Runer is designed with HIIT in mind. Burning up to 30% more calories than a motorized treadmill, users can change speeds at will. In addition, there is no maximum speed, so feel free to push it as hard as possible. The AirRunner is built with a steel frame and handrails, corrosion resistant hardware, and a slat belt running surface that lasts up to 150,000 miles! There's no need for you to adjust the belt tension or replace the deck. This treadmill is the easiest to maintain that you'll find anywhere.