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Why the impedance technology? The impedance technology is painless and provides information about the human body composition in seconds:
Fat mass Lean mass	Water Basal metabolism
The impedance technology provides full control over diet recommandation results allowing for immediate correction to reach the initial objective.
What is the measure? The impedance is the measure of the opposition encountered by an electrical current of low intensity when it travels through the body via the water contained inside and outside body cells. There are 2 types of devices:
monofrequency devices multifrequency devices
Monofrequency devices only measure the total water contained in the body; They estimate the dry mass and don't allow for measuring the dry mass (muscular mass, bone structure, guts, etc.
Multifrequency Multifrequency devices measure the extra-cellular and the total water allowing to calculate the intra-cellular water and as a consequence to deduct the dry mass. Therefore multifrequency impedance is more precise and gives more information:
Dry mass Muscular mass	Water Estimated bone structure weight
Quadrapolarity Impedance device are systematically quadrapolar to allow for current transmission throughout the body. Here as well, there are 2 types of devices:
"Foot-to-foot" devices of the weight scale type (mono-frequency) "Foot-to-hand" devices of the weight scale type (mono-frequency) or with electrodes, of the AminoStats Bio ZM type (multifrequency)
"Foot-to-foot" devices only measure the lower end of the body, whereas "foot-to-hand" devices measure the whole body and therefore are more precise.
Interest of multifrequency and "foot-to-hand" The intra- and extra-cellular water provides measurement of the hydric balance and immediate identification of water retention. Fat mass at ideal hydration level provides a constant measure of the fat mass whatever the hydration level, independently from ingested water and menstruation periods. Dry mass without fat provides a follow-up of the muscular mass.
Advantages of multifrequency impedance
it evaluates fat mass it evaluates total water, as well as intra- and extra-cellular water it is safe, non-invasive, fast and cheap it is light and portable it is consistent after repeated measuring

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