Information On Body Composition; Principle Of Body Composition Calculation; What Is Bmi?; Recommended Measurement Times - Omron VIVA Instruction Manual

Information on body composition

Body fat has low electric conductivity
The VIVA measures the body fat percentage by the Bioelectrical Impedance (BI) method. Muscles,
blood vessels and bones are body tissues with a high water content that conducts electricity easily.
Body fat is tissue that has little electric conductivity. The VIVA sends an extremely weak electrical
current of 50 kHz and less than 500 A through your body to determine the amount of fat tissue. This
weak electrical current is not felt while operating the VIVA.
In order for the scale to determine your body composition, it uses the electrical impedance, along with
your height, weight, age and gender information to generate results based on OMRON's data of body
composition.

Recommended measurement times

Understanding the normal changes in
your body fat percentage can help you in
preventing or reducing obesity. Being aware
of the times when the body fat percentages
shift within your own daily schedule will
assist you in obtaining an accurate trending
of your body fat. It is recommended to use
this unit in the same environment and daily
circumstances. (See chart)
Avoid Taking Measurements Under the Following Conditions:
- Immediately after vigorous exercise, after a bath or sauna.
- After drinking alcohol or a large amount of water, after a meal (about 2 hours).
If a measurement is taken under these physical conditions, the calculated body composition may differ
BMI uses the following simple formula to indicate the ratio between weight and height of a person.
The OMRON VIVA uses the height information stored in your personal number or when entering
If the fat level revealed by BMI is higher than the international standard, there is an increased
likelihood of common diseases. However, not all types of fat can be revealed by BMI.
Daily activities
Waking up
Recommended time
Breakfast
2 hours
Recommended time
Lunch
2 hours
Recommended time
Taking a bath or
eating dinner
2 hours
Recommended time
Going to bed
After waking up
Before lunch and about 2 hours
or more after breakfast
In the afternoon about 2 hours
or more after lunch and before
taking a bath or eating dinner
Avoid measurement immediately
after eating or bathing.
Before going to bed and about 2
hours or more after dinner or bath
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