Air displacement plethysmography

Air displacement plethysmography or ADP (also known as whole-body air displacement plethysmography) is a recognized and scientifically validated densitometric method to measure human body composition.wikipedia
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Body composition

fat free massbody composition monitorsfat free mass (FFM)
Air displacement plethysmography or ADP (also known as whole-body air displacement plethysmography) is a recognized and scientifically validated densitometric method to measure human body composition.
The technique uses air as opposed to water and is known as air displacement plethysmography (ADP).

Hydrostatic weighing

hydrodensitometryBerman balance
ADP is based on the same principles as the gold standard method of hydrostatic weighing, but through a densitometric technique that uses air displacement rather than water immersion.

Boyle's law

compressedBoyleBoyle's Gas Law
Boyle's law states that at a constant temperature, volume (V) and pressure (P) are inversely related.

Isotope dilution

isotope dilution mass spectrometryIDMSreverse isotope dilution analysis

COSMED

In 2011, COSMED USA, Inc. completed the acquisition of US company Life Measurement, Inc. (LMI), provider of body composition assessment equipment based on Air Displacement Plethysmography technology.

Adipose tissue

adiposebody fatfat
Before bioelectrical impedance analysis machines were developed, there were many different ways in analyzing body composition such as skin fold methods using calipers, underwater weighing, whole body air displacement plethysmography (ADP) and DXA.