The NordicTrack X16 Treadmill and the iFIT Pro Membership boast technology that puts results within anyone’s reach. iFIT tracks your performance and automatically adjusts the 40% incline to -6% decline range, and 0-12 MPH speed range so every workout can be hands-free and personalized to you. The SpringFlex™ cushioned deck absorbs impact and provides stability to help you push for more in your training. iFIT is the world’s largest outdoor workout library, featuring over 10,000 workouts led by professional athletes and trainers. With iFIT, this treadmill is more than just a treadmill. It becomes an effective personal training tool for real results.