Body Composition

Body Composition describes how much of you is fat mass and fat-free mass.

Measurement options

Method	What it measures	Pros	Cons
DEXA	Regional fat, lean, bone	Detailed and repeatable	Access and cost
BIA scale	Electrical impedance	Easy at home	Sensitive to hydration
Skinfolds	Subcutaneous fat at sites	Low cost	Operator dependent
Tape and weight	Circumferences and scale	Simple trend tracking	Less precise

Body Fat Percentage is the share of your body that is fat mass.

Lean Mass commonly refers to all non-fat tissues

Fat-Free Mass is everything in your body that is not fat, including muscle, organs, bone, and water.