Featuring ProShox cushioning, the ProForm 520 ZNi Treadmill delivers a more comfortable run and reduces the impact on your joints. Take advantage of iFit Bluetooth Smart technology and connect to your iFit account (sold separately) and experience world-class personal training in your home. iFit gives you access to an ever-expanding library of workouts led by elite personal trainers in both studio and global locations, personalizing your experience as you go. Take control of your training with Digital QuickSpeed and Incline controls; adjust your speed up to 10 MPH and get up to 10% incline grade with the push of a button. Your machines large, easy-to-read LCD Window Display allows you to keep track of your stats as you train, honing in on your target heart rate and maximizing your calorie burn. Stay entertained with a built-in audio system that can connect to your own tablet or smartphone (not included) and allows you to blast your favorite workout playlist as you run. A 2.5 CHP* Mach Z motor delivers a powerful and quiet workout with every use, and a revolutionary SpaceSaver design means you can fold your treadmill deck up and walk away – all in one easy step.