BOD POD S/T
How accurate is the
Research studies at
major universities established the outstanding accuracy,
safety and speed of the BOD POD. Before the BOD POD,
the most accepted method was underwater weighing (the
“dunk tank”). When comparing the two methods,
the BOD POD and underwater weighing often produce
identical results. Many top scientists consider the
BOD POD to be even more accurate than underwater weighing
because testing with the BOD POD is so easy. The general
error range of the BOD POD is 1-2% (the same as hydrostatic
How does the BOD POD
measure body composition?
The BOD POD system
measures body composition by determining body volume
and body weight. Once those two variables are determined,
body density can be computed and inserted into an
equation to provide percent fat measurements. Body
weight is easily determined by the use of an accurate
scale. Body volume is determined by applying the gas
law (p1V1=p2V2), an expansion of Boyle´s Law,
pV=c. The BOD POD measures volume by monitoring changes
in pressure within a closed chamber. These pressure
changes are achieved by oscillating a speaker mounted
between the front testing chamber and a rear reference
chamber, which causes complementary pressure changes
in each chamber. The pressure changes are very small
and are not noticed by the individual being tested.
Three measurements are performed to determine body
volume. The volume of the subject chamber while empty
is the first measurement taken by the BOD POD. The
second measurement is the volume of the subject chamber
with the subject inside. By subtraction, the volume
of the subject is determined. Combined with the measurement
of mass, the subject´s density is determined
and subsequently their body composition is determined.
Why is it important to
wear proper clothing?
The BOD POD takes
very accurate measurements of your weight and volume
(the size of your body). Anything that isn´t
“you” – including clothing, jewelry,
or eyeglasses – can produce inaccurate results.
This is why it´s VERY IMPORTANT you wear minimal,
form-fitting clothing such as a lycra or Spandex®
swimsuit. Single-layer compression shorts and/or lightweight
jog bras are also acceptable clothing (without padding
or wires). A swim cap must also be worn to compress
any air pockets within the hair.
How long does a BOD POD
A complete test, including
printed results, can be accomplished in about 5 minutes.
What can I expect during
a BOD POD test?
Testing in the BOD
POD is quick and easy. The process only requires that
the person being tested sits quietly in the BOD POD
for the brief measurement period (no talking or laughing).
You may hear sounds relating to valves opening and
closing or the hum of a fan during the procedure.
However, no pressure changes will be felt and difficult
breathing maneuvers are not required.
How big of a person can
fit in the BOD POD?
The BOD POD is designed
to accommodate a wide variety of human shapes and
sizes. With its generous-sized interior and oversized
window, NFL and NBA teams, sumo wrestlers, and people
weighing up to 500 lbs. use the BOD POD routinely.
Can I test right after
No, you should wait
at least two hours after exercising. The person being
tested in the BOD POD should always be in a completely
What size area is needed
to accommodate a BOD POD system?
The recommended minimum
area needed for the BOD POD is 8 feet long by 8 feet
wide. This size area will provide enough space for
the BOD POD, its components, and allow sufficient
room for the subject to enter and exit the BOD POD.