The Bod Pod® is used in scientific research to accurately measure body fat percentage and fat-free mass, which are key indicators of your metabolism, health, vitality, and performance. Learn if you have the right fat-free mass for your goals after two 40-second measurements in the Bod Pod®. A Performance Scientist will interpret your results and calculate your ideal body weight for health. For accurate results: Avoid heavy meals or vigorous exercise 60 minutes prior to testing. We recommend women wear minimal clothing such as a bathing suit, or a sports bra with tight-fitting shorts/leggings. And men wear tight-fitting underwear.