The FreeMotion i11.9 Incline Trainer is a premium, specialized cardio machine, that performs as an incline trainer or treadmill. Treadmills incline anywhere from 10% to 15% and the FreeMotion i11.9 inclines up to a gut-busting 30% tilt. Ordinary treadmills, even health club quality treadmills, do not have a decline option, for you to run down-hill. This machine declines to -3%, replicating running down hills. One of the "X Factors" of this heavy-duty, top-of-the-line cardiovascular trainer, is that it has a 5.0 continuous duty horse power motor. Typical home treadmills have 2.0 horsepower motors, maybe 2.5 or 3.0 if it's a phenomenal home treadmill. The 5.0 commercial grade motor on the i11.9 Incline Trainer provides smooth and safe running for the user, without belt skips, with a speed that ranges up to 12 MPH. Featuring a commercial, double-layered, double-sided deck, the i11.9 Incline Trainer is built to last. Stretch out your stride with the 22" x 60" 2-ply, maintenance-free treadbelt and feel the incredible joint protection with built-in isolator cushioning.