Tough on You, Easy on the EnvironmentA remarkable feature, 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 also the lightest treadmill available with a 33” width.Optimal for Interval TrainingBecause the Assault team knows the effectiveness of interval training, our treadmill was designed with HIIT in mind. Burning more calories than a motorized treadmill, users can change speeds at will. In addition, this badboy has no maximum speed, so feel free to push it as hard as possible.Commercial DurabilityThe AirRunner is well-appointed to kick your a** for years, built with a steel frame and handrails, corrosion resistant hardware, and a slat belt running surface that lasts up to 150,000 miles. That’s right – that’s not a typo: 150,000. 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.