True Fitness Z5.5 HRC is a top-of-the-line treadmill designed to help you achieve your fitness goals. With its patented Heart Rate Control (HRC) System, the Z5.5 HRC automatically adjusts both grade and speed to help you maintain your target heart rate, ensuring an effective and efficient workout. The Z5.5 HRC also features a generous 22" by 60” running surface, providing ample space for a comfortable and safe workout. Additionally, the Z5.5 HRC is equipped with a state-of-the-art 3 hp motor that delivers a smooth and quiet workout experience.