The iFIT stride adjust card comes in three different categories to help you get the results you want with the customization you need. In the Short Stride Workout you attack your thighs, really stretching them out and developing long lean muscles. Those long lean muscles will look good and muscle burns fat by raising your metabolism. You will burn calories faster than ever before even when you're resting. In the Middle Stride Workout the focus of your workout is on your hips, core and abs. The middle setting will help you get rid of the belly pooch, love handles and buthighs (butt-thighs). You'll drop dress and pant sizes faster than you can buy new clothes. In the Long Stride Workout you'll attack the backs of your legs and buns, slimming away the cellulite and dimples. For women the long stride might be the most important stride. What woman doesn't want a great butt? *These iFit® cards are only compatible with Treadmills, Ellipticals, Bikes and Incline Trainers that have iFit® SD card slots.