Bioimpedance is a fast, modern, and highly informative method for determining body composition. It measures the resistance of body tissues to electrical impulses, allowing assessment of muscle mass, fat mass, body fluids, and bone mass, as well as their percentages. This also enables calculation of biological age and metabolic rate.
Bioimpedance analysis is highly valuable in diagnosing various conditions and provides essential information when weight management is needed — whether to lose excess weight without losing muscle mass or, conversely, to gain weight through fitness.
This method also allows separate measurement of subcutaneous and visceral fat (especially important for individuals with or at risk of cardiometabolic diseases). It can also assess specific body parts, such as the composition of the upper arm.
This method is essential for evaluating body composition, as height and weight alone do not indicate conditions such as obesity. It is important to know muscle mass and body fluid levels. For example, athletes may have a high BMI due to increased muscle mass. During illness, these parameters may change — fluid retention can result in a normal BMI but reduced muscle mass. Before plastic surgery or liposuction, it is also important to determine the amount of subcutaneous fat, as this is what is removed.
How is the examination performed?
Before the examination, the doctor measures height, weight, and various body circumferences. The test can be performed either standing or lying down.
In a standing position, the client stands barefoot on the device and holds its handles. In a horizontal position, the client lies on a couch, and electrodes are attached to the hands and feet.
Measurements are performed automatically by passing a mild, imperceptible electrical current through the body.
Preparation before the examination
Do not eat or drink for 4 hours before the test
Avoid physical activity for 12 hours before the test
Do not urinate 30 minutes before the test
Do not consume alcohol for 48 hours before the test
Do not use diuretics for 7 days before the test
Do not undergo the test during menstruation
Do not undergo the test if pregnancy is possible
Do not undergo the test if you have a fever
The test is not recommended for patients with a pacemaker
Duration
The examination takes approximately 15 minutes, and the full visit lasts about 30 minutes.
Results and follow-up
Immediately after the examination, the client receives a computerized report showing body composition and proportions at the time of testing, along with recommended target values.
After the assessment, a specialist develops a personalized plan:
an aesthetic specialist — body care/treatment program
a nutritionist or dietitian — dietary plan
a physiotherapist or fitness specialist — suitable physical activities
If the examination indicates potential health risks (e.g., cardiovascular diseases), consultation with a relevant specialist is recommended.
How often should it be performed?
It is important to repeat the examination during treatment to monitor changes in body composition over time. Follow-up tests should be conducted under similar conditions as the initial test (e.g., same time of day, same phase of menstrual cycle for women, etc.).
Paid services are available.
