More than 40% of U.S. adults are considered obese. That's according to the Centers for Disease Control and Prevention. But doctors and health experts say there are different types of fat. Some are ...

Here’s what to know about body composition numbers and what these metrics mean for your health and performance.

There are various types of body composition tests (more on these below). Still, each one measures the percentages of fat and fat-free mass (muscle and bone) in the body. Knowing these percentages can ...