The ProForm Pro HIIT H14 is made for cross-trainers because it works the entire body without damaging the knees or other sensitive joints. The Pro HIIT H14 differs from other machines by having a more vertical elliptical path that makes it an elliptical trainer/stepper hybrid. To add variety to the workout, the multi-grip handlebars move with an invigorating, box-like motion, giving arms and core a workout. And thanks to the alternating intensity levels, users stimulate their metabolism not only during the workout, but for many hours afterward. This machine can do it all!