Body composition

Jump to navigation Jump to search
Body composition

WikiDoc Resources for Body composition


Most recent articles on Body composition

Most cited articles on Body composition

Review articles on Body composition

Articles on Body composition in N Eng J Med, Lancet, BMJ


Powerpoint slides on Body composition

Images of Body composition

Photos of Body composition

Podcasts & MP3s on Body composition

Videos on Body composition

Evidence Based Medicine

Cochrane Collaboration on Body composition

Bandolier on Body composition

TRIP on Body composition

Clinical Trials

Ongoing Trials on Body composition at Clinical

Trial results on Body composition

Clinical Trials on Body composition at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Body composition

NICE Guidance on Body composition


FDA on Body composition

CDC on Body composition


Books on Body composition


Body composition in the news

Be alerted to news on Body composition

News trends on Body composition


Blogs on Body composition


Definitions of Body composition

Patient Resources / Community

Patient resources on Body composition

Discussion groups on Body composition

Patient Handouts on Body composition

Directions to Hospitals Treating Body composition

Risk calculators and risk factors for Body composition

Healthcare Provider Resources

Symptoms of Body composition

Causes & Risk Factors for Body composition

Diagnostic studies for Body composition

Treatment of Body composition

Continuing Medical Education (CME)

CME Programs on Body composition


Body composition en Espanol

Body composition en Francais


Body composition in the Marketplace

Patents on Body composition

Experimental / Informatics

List of terms related to Body composition

This article is about the body's contents of fat, bone, and muscle. For the chemical composition of the human body, see Composition of the human body.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

In physical fitness, body composition is used to describe the percentages of fat, bone and muscle in human bodies. Because muscular tissue takes up less space in our body than fat tissue, our body composition, as well as our weight, determines leanness. Two people at the same height and same body weight may look completely different from each other because they have a different body composition.


The National Institute of Health[1] recommends that a healthy adult male's body should have between 13 and 17 percent fat. A healthy female's body should be composed of between 20 and 25 percent fat. Levels significantly above these amounts may indicate excess body fat. Athletes, leaner individuals, and more muscular individuals will have a body fat percentage lower than these levels. In general, most athletes experience greater performance benefits[2] at body fat percentages between 7 and 19 percent for men, and 10 and 25 percent for women, depending on the sport.[3]

Measuring Body Composition

Body composition (particularly body fat percentage) can be measured in several ways. The most common method is by using a set of measurement calipers to measure the thickness of subcutaneous fat in multiple places on the body. This includes the abdominal area, the subscapular region, arms, buttocks and thighs. These measurements are then used to estimate total body fat with a margin of error of approximately four percentage points.

Another method is bioelectrical impedance analysis (BIA), which uses the resistance of electrical flow through the body to estimate body fat.

A more accurate but less convenient method is using a large tank of water to measure body buoyancy. Increased body fat will result in greater buoyancy, while greater muscle mass will result in a tendency to sink. This is know as hydrostatic weighting.

A technique for measuring body composition has been developed using the same principles as under water weighing. The technique uses air, as opposed to water, and is known as air displacement plethysmography (ADP). Subjects enter a sealed chamber that measures their body volume through the displacement of air in the chamber. Body volume is combined with body weight (mass) in order to determine body density. The technique then estimates the percentage of body fat and lean body mass (LBM) through known equations (for the density of fat and fat free mass).

Body composition measurement with Dual X-ray Absorptiometry (DXA) is used increasingly for a variety of clinical and research applications. Total body or estimated total body scans using DXA give accurate and precise measurements of BMD and body composition, including bone mineral content (BMC), bone mineral density (BMD), lean tissue mass, fat tissue mass, and %fat results [Kiebzak et al (2000) J Clin Densitom 3:35–41]. These measurements are extremely reproducible, making them excellent for monitoring pharmaceutical therapy, nutritional or exercise intervention, sports training &/or other body composition altering programs. They are also fast, simple, non-invasive, and expose the subject to a level of x-rays lower than that of a cross-country flight. DXA exams provide both total body and up to 14 regional (trunk, individual arms & legs, android, gynoid, etc) results.

Body Composition is also estimated using cross-sectional imaging methods like magnetic resonance imaging (MRI) and computed tomography (CT). Since MRI and CT give the most precise body composition measures to-date, many pharmaceutical companies are very interested in this new procedure to estimate body composition measures before and after drug therapy especially in drugs that might change body composition.


  1. "MedlinePlus Medical Encyclopedia: Weight management". Retrieved 2007-11-01.
  2. "Physiology & Psychology: Performance Benchmarks -- Body Composition". Retrieved 2007-11-01.
  3. "A Guide to Body Fat Percentage". Retrieved 2007-11-01.

Template:WikiDoc Sources