If you are overweight for your height, you do the tape test. They measure your waist at the navel and your neck just below the Adam's apple and subtract neck from waist. If you have an obscenely large neck, it affects the ratio therefore giving the appearance that you are within body weight standards. The trick is usually to put on all your heavy clothes and run the day before and then sit in a hot room to drop water weight since the people administering the test are supposed to look for evidence that you used something like saran wrap to redistribute weight for a short time.