Unfortunately, BMI, which is what most people use only gives the rough estimate of whether or not you’re really overweight or obese because people have different body types. We use the technique called the Bod Pod where we actually displace air to determine body density and from your body density we can fairly accurately determine what percentage of your body is fat The reason we have you wear compression tights or Speedo swimsuit is we don’t want any air trapped in the garments mass is important to the overall computation so this is an important step What I’m going to have you do is put a swim cap on and that’s again, it’s the same thing as the shorts, it’s because your hair traps air around it and it just helps compress everything down so we’re getting a more accurate volume I’ll have you sit exactly like this I’m going to close the door It takes about 50 seconds Try not to move, because the more you move the more the air will fluctuate in there We’ll do 2 of those And if those are in agreement, we’ll do a third with the hose The first 2 measurements are volume measurements so we’re strictly measuring the amount of air he displaces in the Bod Pod And the third measure will be to measure the air that moves in and out of his lungs as he’s breathing so we can subtract that out of his volume Once we get the volume, and we have his body weight we can calculate body density Once you have body density we can put that into prediction equations for percent fat and that’s based on different gender, age, and different race. With the Bod Pod we can use, in both the pediatric population, and we can go up to about 450 pounds. All right you doing okay? Not too strenuous, huh? Instructions from the computer will be, you’ll see a histogram to breathe in and breathe out It’s just having you breathe your normal breathing pattern And that’s all there is to it!