 |
|
|
 |
effects
of subject test position on results
|
 |
|
Impedance Test Position - Lying Down
To ensure accurate results an impedance test should be conducted using
the following test protocol:
|
1. |
Subject should be lying down facing up. |
|
2. |
Subject should relax and be as still as possible with
hands at least 6 inches from the body, palms facing down. |
|
3. |
Subject's feet should be at least 8 to 12 inches apart
so that the legs are not touching at the thighs. |
|
4. |
Subject's right ankle and wrist are exposed. Nylon
hosiery should be removed. |
The regression equations used in the analyzer to calculate fat weight were
developed using the above test position. Deviations from this position
may change the normal path followed by the test current as it flows through
the subject's body. Bioimpedance tests conducted with the subject's arms
on the chest or with legs crossed or too close together may lead to slightly
lower body fat results.
Standing vs. Sitting Test Position
If room is not available to test subjects lying down, then impedance testing
can be done with the subject standing or sitting.
If tested while standing or seated the subject's bioresistance will average
approximately 10 to 20 ohms less than while lying down. This difference
results in slightly lower body fat readings of approximately 0.5 to 1.0%.
If you are testing subjects standing or seated, the standing position should
be your first choice. For subjects who cannot stand, test them in the seated
position.
Note: When testing standing or sitting subjects, maintain the basic
test procedure with the subject's legs spread shoulder-width apart and
arms held away from the body 6 - 10 inches. |
|
 |
|
 |
|
|
