Impedance is the frequency-dependent opposition of a conductor to the flow of an alternating electric current. Impedance is composed of two main properties, resistance and reactance.
InBody provides segmental impedance values at varying frequencies to allow for accurate analysis of the human body. Since reactance is the interrupting force of alternating current flow, it increases in proportion to the integrity of cell membrane. Therefore, reactance and phase angle decrease when the number of cells is low or the cell membrane is more permeable or unhealthy.
InBody devices use direct segmental measurement bioelectrical impedance analysis (DSM-BIA) to precisely measure body composition by sending multiple electrical currents through the body, resulting in up to six different impedance readings for the trunk and each of the four limbs.
The innovative in-depth analysis of the InBody Test yields accurate results for body composition outputs, such as body fat mass, skeletal muscle mass, (segmental) lean body mass, and percent body fat.
Almost all printers using PCL3 or above are compatible with InBody devices. However, InBody units are sold with a standard configuration that includes a compatible printer. Download the list of compatible printers in our download center <a href=”https://inbodyusa.com/pages/download-center”>here </a>.
Adhesive tape electrodes are usually placed on the wrist and a fingertip. Voltage line and current flow line always overlap from a certain point, and that point is where measurement begins. However, it is almost impossible to place adhesive electrodes in the exact same place every time, thus the measurement starting points can differ. Rather than adhesive tape electrodes, InBody devices use tactile electrodes. Voltage line and current flow line overlap at the same point and allow for a secure and reproducible measurement starting point for each individual.
Using multiple frequencies improves accuracy and precision. At a single, low frequency, it is difficult for electrical currents to penetrate the cellular membrane and assess intracellular water. As frequencies get higher, the electrical current is more capable of penetrating the cellular membrane and accurately measuring intracellular water.
InBody technology is different than that used in other BIA devices. InBody technology relies on direct measurement and can measure the body in a segmental fashion; is capable of accurately measuring impedance in the trunk region; uses multiple frequencies and does not need to use empirical estimations in calculating values; and evaluates a wide range of body types, from extremely obese, to elderly, to athletic.
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