The Zero Runner is a hybrid of a treadmill and an elliptical so you get the best of both – a true running motion without the impact. It is a powerful tool that enables runners to better manage repetitive impact forces that over time can damage the body. Replicate real running motion by fully extending your lower leg and kicking up your heel – just like you do outside. Whether running outside or inside, one thing you get is jarring impact. Run smarter on the Zero Runner by supplementing high impact outside runs with lower impact. By eliminating stress on the joints and muscles, the Zero Runner helps runners manage recurring issues, avoid future injuries and extend their running career. What makes the ZR8 so unique are the aircraft-grade aluminum legs that facilitate a faster cadence, the lightweight pedals, higher resistance range, performance grips for progression training and technology that helps correct imbalances. Unlike anything available to runners, every detail of the ZR8 is engineered for unprecedented futuristic performance, efficiency, power and speed.