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Visceral fat, circumferences and metabolism

This part of the result combines several different questions: where fat is stored, what circumferences mean, how resting energy is estimated, and which indices are only supplementary calculations. Reading it in groups is therefore more useful than treating it as one long list of numbers.

Where to find it: The Visceral Fat Analysis, circumferences and basal metabolic rate.

Illustration of the abdominal region and resting energy flow

Relationship guide

A useful reading order

Start with visceral fat area and simple circumference measures. Move to energy and research indices only afterwards, because they sit further away from the directly measured signal.

  1. 011. Visceral fat: amount and location are not the sameTotal body-fat percentage tells you how much fat the body carries. Visceral fat area and level try to describe how much of it is stored inside the abdominal cavity.
  2. 022. Circumferences: a device estimate is not a tape measurementA value in centimetres may look directly measured, but without an add-on module the device estimates most circumferences from body composition.
  3. 033. Energy: BMR is neither daily expenditure nor a meal planBasal metabolic rate is an estimate of energy required at rest. Recommended calorie intake adds further model assumptions and answers a different question.
  4. 044. Research indices: inspect their inputs firstBAI, ABSI, the Conicity Index and other supplementary measures mostly rearrange information already present in weight, height, circumferences, muscle and visceral fat.

01

1. Visceral fat: amount and location are not the same

Total body-fat percentage tells you how much fat the body carries. Visceral fat area and level try to describe how much of it is stored inside the abdominal cavity.

Visceral Fat Area (VFA) is a modelled estimate of area in a cross-section of the abdomen, not a CT image and not fat mass in kilograms. Visceral Fat Level places similar information on a coarser device scale.

Subcutaneous and visceral fat should not be confused. Visible or palpable abdominal fat may be mostly subcutaneous, while visceral fat sits between the organs. Read VFA alongside total fat mass and waist circumference rather than instead of them.

  • VFA and Visceral Fat Level are estimates derived from bioimpedance.
  • A single value does not establish a diagnosis or personal health risk.
  • Agreement between several measures is more convincing than a small shift in one number.

Explained values

Visceral fatVFAVisceral Fat Area estimates how much space fat stored around the internal organs would occupy in a cross-section of the abdomen; it is given in cm².Visceral fat levelVFLVisceral Fat Level is the estimate of fat around the organs converted onto a coarse whole-number scale.Limb fatArm and leg fat is an estimate of the fat mass stored in the limbs, that is outside the trunk.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.Percent body fatPBFPercent Body Fat tells you what share of your total weight is made up of estimated fat mass.
Useful comparisons: Visceral vs. subcutaneous fat →Related guides: Visceral fat on InBody: what it means and when to pay attention →Related guides: Can you check metabolic health without a blood test? →

02

2. Circumferences: a device estimate is not a tape measurement

A value in centimetres may look directly measured, but without an add-on module the device estimates most circumferences from body composition.

Segmental circumferences of the neck, chest, abdomen, hips, arms and thighs are modelled estimates. For the waist, the optional Yscope module can replace the estimate with a direct measurement; without it, the same caution applies as for the other derived circumferences.

The waist-hip and waist-height ratios only restate their input circumferences. If you need a precise independent trend, measure your waist with a tape using the same protocol and record it alongside the InBody result.

  • An estimated circumference inherits uncertainty from the body-composition calculation.
  • A tape measurement and a device estimate are not interchangeable methods.
  • Ratios are easier to understand when their input circumferences are visible too.

Direct tape measurement

ƒ

BIA model estimate

These are different methods

Teaching diagram — these are not your measured data.

Explained values

Waist circumferenceWaist circumference on an InBody result sheet is an estimate calculated from body composition rather than a tape-measured value — unless the Yscope module is attached.Waist-hip ratioWHRThe waist-hip ratio compares waist circumference with hip circumference and describes whether fat is stored centrally around the abdomen or lower on the hips and thighs.Waist-height ratioWHtRThe waist-height ratio relates waist circumference to body height, so it describes central fat storage independently of how tall you are.Body circumferencesBody circumferences are estimates of the dimensions of eight sites — neck, chest, abdomen, hips, both arms and both thighs — derived from body composition.Arm circumferenceACArm Circumference and Arm Muscle Circumference are estimates of upper-limb dimensions that the manual uses as simple nutritional indicators.
Useful comparisons: Waist circumference vs. waist-hip ratio vs. waist-height ratio →Related guides: Preventive checkups 2026: why waist circumference now matters, and what InBody adds →Related guides: Visceral fat on InBody: what it means and when to pay attention →

03

3. Energy: BMR is neither daily expenditure nor a meal plan

Basal metabolic rate is an estimate of energy required at rest. Recommended calorie intake adds further model assumptions and answers a different question.

InBody estimates BMR from body composition, particularly fat-free mass. BMR does not cover ordinary movement, training, digestion or changing daily activity, so it is not the same as total daily energy expenditure.

Recommended calorie intake is another algorithmic output. It does not know your actual activity, goal, medical context or dietary history, so it cannot replace an individual plan from a qualified nutrition or healthcare professional.

  • Fat-free mass → model equation → estimated BMR.
  • BMR plus activity and other expenditure components form the broader energy picture.
  • Recommended intake is an orientation value, not a prescribed calorie target.
Fat-free mass
Prediction equation
Basal metabolic rate
Daily energy need
Teaching diagram — these are not your measured data.

Explained values

Basal metabolic rateBMRBasal Metabolic Rate estimates the energy your body uses over 24 hours at complete rest for basic life functions; InBody calculates it from fat free mass.Recommended intakeRecommended Calorie Intake is the device rough estimate of how much energy to take in per day; the manufacturer does not publish the equation behind it.Fat free massFFMFat Free Mass is everything except fat — the sum of body water, protein and minerals in kilograms.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.
Useful comparisons: Basal metabolic rate vs. recommended calorie intake →Related guides: Basal metabolic rate from InBody: how to read it →Related guides: Metabolic age and InBody: why it is not on your result →

04

4. Research indices: inspect their inputs first

BAI, ABSI, the Conicity Index and other supplementary measures mostly rearrange information already present in weight, height, circumferences, muscle and visceral fat.

These indices do not create a new direct measurement. They often build on estimated circumferences and other derived values, so their uncertainty does not disappear merely because the result looks more precise.

When an index changes, return to its inputs. Waist, the waist-height ratio, fat mass, muscle mass and VFA are usually clearer for ordinary decisions. Supplementary indices are not diagnostic criteria.

  • More decimal places do not mean more accurate or more important information.
  • A threshold included in a device report is not automatically a medical diagnosis.
  • If an index conflicts with its inputs, prefer the clearer input values and their trend.

Explained values

Body shape indicesBody shape indices are supplementary research measures that relate body circumferences to height, weight or muscle mass in various ways.Obesity DegreeObesity Degree expresses your weight as a percentage of a reference weight derived from height; it says nothing about body composition.ECM/BCMECM/BCMThe ECM/BCM ratio compares extracellular mass with body cell mass and serves as a supplementary indicator of nutritional status.
Related guides: BMI vs body fat percentage vs muscle mass: what to really track →Related guides: How to read InBody results and what actually matters →

Evidence used

The guide combines official InBody documentation with general bioimpedance methodology and authoritative context for circumference measures. Device estimates are deliberately not presented as direct anthropometric or imaging measurements.

Content reviewed · 2026-07-26

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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