All it takes to get fit is this oddly shaped hula hoop called the Step 2. Those huge massaging nubs on the hula hoop directly stimulate your body for some reason or another. Just ignore the possible resulting skin abrasions and bruising.
Oh, and because of its “effectiveness,” you need to take appropriate caution when using the Step 2. Consult your physician if you have “serious back, hip, waist, or knew problems.”