product was designed to meet the needs of our consumers who have grown accustom to the level of performance and feel of our commercial model treadmills / elliptical and demand that the same level of performance in their home.Elliptical trainers have long been a staple of fitness facilities around the globe. The smooth action and low impact motion of these machines is a leading reason for their popularity, yet until now, elliptical did not allow adjustments to accommodate your individual size, stride and fitness level"one size fits all". The fitness market has never seen such a futuristic machine before. Nautilus Pro Series elliptical trainers use an advanced stride technology called My Stride™. My Stride™ is a patented system that automatically adjusts your stride length to fit your individual leg length and workout rate. The My Stride™ system requires no guesswork, no buttons to push or levelers to move simply get on and go My Stride™ will do the rest!