Bio Impedence Analysis – BIA Test
When you are losing weight, how do you know you are losing fat? Why doesn’t the scale move even though you are eating well and exercising? Is your body functioning better with the dietary changes you have made or is your body suffering with too much inflammation? How could you possibly know the answers to these questions by standing on your scale? The truth is that you can’t.
That is why I use a machine called a BIA to assess the changes my clients are experiencing as they go through a nutritional protocol with weight loss as a goal.
BIA, or Bio Impedance Analysis was initially developed by the military several decades ago to assess how soldiers would do in cold weather survival situations. The technology is now used in various health applications, such as in AED (defibrillator) units to reset the heart of someone having cardiac failure. It aids in helping the AED unit determine how much voltage should be used based on the readings of the patient. In the application of determining body composition (and body mass index) it is considered the second most accurate estimate next to the immersion technique which is far too cumbersome in a clinical setting.
What information does the BIA tell us? It gives us three main categories of mass for the body. It gives us fat in pounds and as a percentage. It also gives us lean dense mass which is a rough reflection of lean muscle mass including the water in the muscle. And last, it gives us total body water. This allows us to track the actual reduction of fat as we progress through a program. If we are losing weight appropriately, fat should be lost in the greatest amount.
Additional biomarkers that are given by the BIA results are body mass index (BMI), phase angle, and basal metabolic weight. With all the various objective findings the BIA machine gives us, it allows us to understand how the body is changing at a much deeper level than looking at the scale alone. The body mass index gives us a very accurate reflection of health risks associated with excess weight. The phase angle is an indication of how efficient the body functions at the cellular level, and is closely related to mortality. This makes sense, as when the body shuts down at the cellular level the phase angle will plummet. Therefore, the higher the phase angle the more efficiently the body is functioning. Basal metabolic weight allows insight into the amount of calories that will be burned in a 24 hour period by the body. This is estimated for both calories burned with, and without, activity for a 24 hour period. This is a good indicator of metabolism rates and also depicts how important activity is to burning calories.
Two of the best biomarkers the BIA reports are intra and extracellular water. This gives us an estimation of inflammation in the body. With chronic inflammation being the precursor to all chronic disease, this marker allows us to see how therapeutic interventions affect inflammation in the body. This also sets up the learning process for the person going through the nutritional therapy program. If we show that a change in dietary intake is impacting these critical biomarkers, it is a huge motivator to continue with your changes! This helps us to turn a diet into a lifestyle – THEE critical step in maintaining weight loss. This test helps the client understand the intimate relationship between the food we eat and our health, as well as how quickly the impact of our food choices will influence physical results in our body.
As you can see, the BIA test gives us a great deal of information that is useful to understanding our health. Another plus, is that it is inexpensive and non-invasive. You do not even feel the test. It uses pads that attach to your hand and foot, and sends an electrical current through your body at such a weak level that you cannot even feel it. These readings are then fed into a computer program along with other information about the client to get the results. These results have been used in many research environments and are proven to be an effective way to assess body composition.
We are always striving for ways to help our clients be healthy. Using the BIA machine, when appropriate, is just one way we do that. We have literally done thousands of BIA tests at our office. We understand the test, how to interpret the results, and the limitations of the test (all testing has limitations). The knowledge gained from the test is used to educate our clients. This is just part of the process of learning to live INHealth!