The Nordic Track® E9 ZL elliptical is a supreme quality crosstrainer for a high intensity workout. The 22kg flywheel provides a huge crank inertia rating of 260, 000 kg/cm 2 giving the machine its super-smooth feel even under the greatest loads. 23 workouts, 12 pre-programmed, 8 heart rate contorlled & 3 Watts, plus i Fit® SD card compatibilty provide you with plenty of training options. Measure your heart rate wirelessly with the included Polar™ T34 chest belt & receiver to make the heart rate controlled workouts extra efficient.