With upgraded bushings and sealed bearings, this heavy-duty elliptical operates much smoother than your average elliptical and will far outlast most ellipticals available on the retail market. Much like having a personal trainer create a custom workout for you, this elliptical will create custom workouts based on your input. Super easy to use, the NordicTrack Commercial 1600 helps you get what you really need out of every workout. Not only will you enjoy smooth operating resistance, but you can instantly adjust your resistance at any time during your workout with the touch of a single button instead of having to scroll through options. 9 Personal Trainer Workouts automatically adjust the pace and resistance of the elliptical during your workout to focus on aerobic, weight-loss, or performance goals. 3 Heart Rate Workouts help you stay in your target workout zone by automatically increasing the pace and resistance when you need to raise your heart rate and lowering the speed when you need to lower your heart rate. It also includes 3 workouts you can create yourself.