AI Tutor
If you step on a bathroom scale, it shows one number for your total weight. But that single number does not tell you what is actually inside your body!
Your body is built from several different materials, including strong bones, powerful muscles, lots of water, and stored fat.
So what do doctors and coaches call this mix of ingredients inside you?

What Is Body Composition?

Body composition is the breakdown of how much fat, muscle, bone, and water make up your total body weight.
Scientists usually divide your body into two parts: fat mass and lean mass (which includes everything that is not fat, like muscles and bones).
You might hear the word 'fat' and wonder: why does our body even need it in the first place?

Why Your Body Needs Fat

Fat is an essential nutrient, and your body must have essential fat to survive and work properly.
Fat acts like a soft shield that protects your organs from bumps, keeps your body warm in the cold, and stores backup energy for when you run around.
Fat keeps us safe, but what does muscle do for us?

The Power of Muscle