How do body fat monitors and body composition monitors work?
Bio Electrical Impedance Analysis (BIA) – provides personalised readings to the user.
How it works:
A low, safe signal is sent through the body via metal footpads on the scale platform. Based on the principle that muscle tissue contains high levels of water, and therefore acts as a conductor for the signal. Fat contains little water and acts as a resistor to the flow of the signal.
This resistance or ‘impedance’ is set against gender / height / age and is used to calculate personalised body fat and composition readings.
Advanced dual frequency technology
Based on the same principle as BIA but is far more advanced allowing additional body composition readings (abdominal fat, metabolic age etc) to be attained for each user.
BIA accuracy depends on:
• Size and number of the footplates – four footplates are required to ensure maximum accuracy of body fat readings.
• Quality of equations used to calculate personalised body fat / composition readings. The larger the sample size and techniques used for research the more accurate the equations will be. Tanita for example has used over 100,000 people world wide to ensure maximum accuracy of readings.
• Weighing accuracy – essential for consistent readings over time. This depends
on the robustness of the weighing mechanism and platform.