Bioelectrical Impedance Testing and Body Composition Analysis

Bioelectrical impedance analysis (BIA) is a body composition test in which a low-intensity alternating current measures the resistance it encounters as it passes through various tissues—such as bone, fat, or muscle.

BEFORE THE TEST

Several factors must be considered before taking the test:

• Remove all metal or electronic objects—they aren't dangerous but can distort the results.

• Take the test barefoot and with minimal clothing, as extra layers can artificially increase your body weight.

• Time of day matters: The ideal time for testing is early in the morning on an empty stomach. Eating or drinking before the test can affect results.

Always note the time of your test so you can compare future results consistently.

WHAT DOES THE TEST INCLUDE?

After the test, you’ll receive a report with several key metrics, including:

• Total body weight broken down into:

  • Fat mass

  • Lean mass, including:

    • Dry lean mass

    • Body water (intra- and extracellular)

• Basal metabolic rate (calories burned at rest over 24 hours)

• Body Mass Index (BMI) and Percent Body Fat (PBF)

• Information about muscle mass distribution

WHY DO THIS TEST?

Just like any other assessment, this test provides specific data on a variable impacted by your training. If your goal is to change your body composition, a BIA device offers far more insight than a standard scale.

BIA can also reveal:

• General health indicators

• Signs of inflammation

• Muscle balance between body segments

That said, if numbers stress you out or you're simply not interested in your body composition, there’s no obligation to take the test. However, for your kinesiologist, this information—kept strictly confidential—can be a helpful tool to monitor your health and track your progress.