The Cybex SPARC Trainer 50A1 Elliptical is a HIIT trainer that does it all, it is designed provide exceptional results but with less stress. It is biomechanically engineered to be gentler on joints, motivating users to train harder while reducing body strain. With 2 modes of operation: Circuit Mode executes a single and quick high power movement that typically lasts less than a minute and Interval Mode with user-defined high intensity workout and rests, typically lasts longer. Gain strength and build muscles with the Cybex SPARC Trainer 50A1 Elliptical.