Built for powerful results, this treadmill features 16 built-in workout apps designed by a Certified Personal Trainer. Each workout automatically adjusts your speed and incline to maximize your results. And, with Quick Incline™ and QuickSpeed® Controls, you can quickly customize each workout with the touch of a button. The 515 TX Treadmill also features ProTech™ 3 Cushioning which reduces impact on your joints from 26-33% as compared to running on the road. Other features include a 2.0 CHP Mach™ Motor, Dual-Grip EKG™ Heart Rate Monitor and a backlit LCD.