BIA body shape analysis -
Impedance measurement in clinical medicine. With time and a growing interest in body composition, other methods emerged. Bioelectrical impedance analysis is now widely used in the medical field to distinguish the amount of body water, body fat and skeletal muscle in a body.
The analysis first obtains total body water TBW. This is the amount of fluid that can be found inside and outside your body cells. Using ratios of bioelectrical impedance measured at a separate frequency, complex equations then estimate the amount of fat-free mass within the body. The amount of body fat is finally deducted from the total weight.
Note: Bioelectrical impedance is also a method used in cardiology to assess pulse wave velocity, another biomarker that determines the stiffness of the arteries to infer cardiovascular health. Learn more about pulse wave velocity. The signal used in bioelectrical impedance analysis is totally safe and painless for both adults and children, but note that bioelectrical impedance is not recommended for people with pacemakers.
On one hand, many scientific publications attest to the reliability, precision and accuracy of the BIA method in providing valid estimates of total body water in individuals. On the other hand, there is still a need for standardization and consensus on certain factors that may alter the test results.
Because muscles are largely composed of water, dehydration decreases the amount of fluids and electrolytes that might lower the conduction of these tissues. As a result, fat-free mass is more likely to be underestimated.
Hydration levels vary widely throughout the day, which explains why consistency is an important factor in accurate BIA estimation. However, fat-free mass is still often underestimated in children. Because the equations that interpret the fat-free mass based on total body water results rely on reference population segments, the body composition estimate might be inaccurate for people considered to be overfat.
People wearing metal implants may experience an underestimated body fat reading. However, this reading will remain constant over time, so they can successfully track their changes in body composition. Many devices have been designed to measure bioelectrical impedance with increased accuracy and convenience over the years.
Using the same measurement method, they mainly differ in terms of the number of electrodes and which section of the body is being measured vs. which one is being estimated. Beyond the design of these devices, what matters is also the nature and complexity of the algorithm performed to estimate total body water and fat-free mass based on the received frequencies.
To build these algorithms, scientists use body fat standards that can vary. Using smart scales to measure your body composition can help you reliably and cost-effectively track changes if the measurement remains at a consistent level.
These scales have the ability to send the electrical current up one leg and down the other leg. Before using, users must set their age, height, and sex.
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It works only in coordination with the primary cookie. With BIA you can get an accurate measurement of your risk of diabetes, cardiovascular disease and a number of other health complications. BIA also measures the body mass and fluid that helps determine your current state of health.
The information gained through BIA can go a long way in early intervention and prevention. BIA keeps an eye on your lean fat free weight and fat weight, which is more effective than going off of what you see on the scale.
BIA simply involves two electrodes being placed on your right hand and your right foot. A small electrical current is channeled through your body, and the amount of the water in your body affects the electric current. The electrodes measure how the signal is obstructed through multiple types of tissue.
What BIA does is measure how resistant the electric current is as it is channeled through your body and gives estimates of the amount of water currently in your body.
This information is then used to determine how much body fat you have. The margin of error for BIA is roughly four percent, which can be compared to the skinfold caliper method.
For the hydrostatic weighting method, the margin for error is 2.
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