This is a very fair question. Ideally, we would be able to determine your exact body composition, but that’s just not possible. Every available resource for measuring and tracking changes in your weight, body fat, muscle mass, and even caloric expenditure is, to some degree, flawed. Instead of relying on one resource, we encourage you to utilize as many tools as possible to get the best overall assessment of how your body is changing and, more importantly, to ensure that you’re making consistent progress. The Bod Pod is simply one of those tools. We recommend that at the very least you track your body weight (scale), body composition (Bod Pod), circumference (tape measure at your neck, upper arm, chest/nipple line, upper abdomen, belly button, hips, thighs, and calves), and take biweekly/monthly progress pictures (don’t rely on the mirror).