This top of the line Precor commercial treadmill was designed with the serious athlete in mind. It features a 4.0 hp motor, 1.5-16 mph speed range, and a -3% to 15% incline/decline ramp. The Precor C966i provide running decks that are secured at the back so you get the greatest shock absorption at the front, where you need it most. Relative perceived exertion (RPE) is the difference between how hard your brain says you're working and how hard your heart actually works. If you're jogging, the perceived level of exertion drops when impact to your ankle, knee and other affected joints is reduced. Precor's patented treadmill technology absorbs the impact of each foot strike up to 38% more than other treadmills. The Precor c966i is a commercial grade treadmill that would work great in a home or gym!