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Body composition

The four basic components the body is made of: water, protein, minerals and fat. Most other values on the result sheet are derived from them.

Where to find it: The first table at the top of the result sheet, labelled Body Composition Analysis.

Values in this section

WeightWTWeight is the only quantity InBody actually weighs; every other component of body composition is derived from it and from impedance.

Total body waterTBWTotal Body Water is the sum of the water inside and outside your cells in litres, and it is the quantity InBody derives the rest of body composition from.

Intracellular waterICWIntracellular Water is the volume of water inside the cell membranes in litres, and the manual puts it at roughly 62 percent of total body water in a healthy person.

Extracellular waterECWExtracellular Water is the volume of water outside the cells — in the interstitial space and in blood plasma — and the manual puts it at roughly 38 percent of total body water.

ProteinProteinProtein is the calculated mass of the protein component of your body in kilograms — it has nothing to do with how much protein you eat.

MineralsMineralsMinerals are the estimated mass of the mineral component of your body in kilograms; bioimpedance cannot measure them, so the value comes from correlation with DEXA.

Bone mineralsBMCBone Mineral Content is the estimated mass of the mineral component of bone tissue in kilograms, calibrated against the DEXA method.

Fat massBFMBody Fat Mass is the amount of fat in kilograms — an absolute figure, unlike percent body fat, which is only a share of weight.

Fat free massFFMFat Free Mass is everything except fat — the sum of body water, protein and minerals in kilograms.

Soft lean massSLMSoft Lean Mass is fat free mass without bone minerals, that is the soft part of non-fat tissue including all of your body water.

Muscle massSMMSkeletal Muscle Mass is an estimate of the amount of voluntarily controlled muscle in kilograms — the muscle between bones and joints that produces movement.

Body cell massBCMBody Cell Mass is defined by the manual as intracellular water plus protein — the part of the body made up of the cells of your own tissues.

Explanations make the most sense alongside your own trend.

The public guide is open to everyone. The client portal adds your own value, history and the context of a specific measurement.

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