After reading the first part of our article, you already know the methods of body composition analysis, what bioelectrical impedance analysis (BIA) is, and how the body composition analyzer used in our nutrition clinic works. You’ve also learned about the key parameters that can be determined with this method. Now it’s time for the next dose of information. In the second part of this publication, you will read about what body composition analysis can tell a dietitian about your health status, its role in dietary planning, and its importance in creating training plans for athletes. Finally, we’ll share tips on how to prepare for body composition analysis and highlight the contraindications for performing the test.

Authors: M.Sc. Eng. Klaudia Buczek, M.Sc. Pharm. Michał Miśta

Table of Contents:

  1. What is Body Composition Analysis Using the BIA Method?
  2. Body Composition and Health
  3. Body Type and Overweight or Obesity
  4. The Role of Body Composition Analysis in Weight Loss
  5. What is Metabolic Age?
  6. How to Prepare for a Body Composition Analysis?
  7. Limitations of Body Composition Analysis with the Analyzer
  8. Contraindications for Body Composition Analysis Using Bioelectrical Impedance Analysis (BIA)
  9. What Are the Norms in Body Composition Analysis?
  10. Body Composition Analysis Results – Consultations with a Dietitian
  11. How to Book a Body Composition Analysis at the Made By Diet® Nutrition Clinic?

1. What is Body Composition Analysis Using the BIA Method?

Body Composition Analysis Using Bioelectrical Impedance Analysis (BIA) is a non-invasive examination that, by measuring the electrical resistance of body tissues, provides detailed information about body composition. It allows for the determination of muscle mass, fat mass, body hydration levels, mineral content, and bone mass. This method is quick, safe, and precise, and its results enable the monitoring of body composition, making it applicable in nutrition, sports, and health assessments.

2. Body Composition and Health

Body composition analysis and, most importantly, the proper interpretation of its results, can reveal a great deal about your overall health. The levels of body fat, muscle mass, and water content play a crucial role in assessing your body’s general condition. The results of this type of examination not only help identify any deviations from the norms but also highlight potential risk factors associated with various conditions, such as cardiovascular diseases, type 2 diabetes, or osteoporosis.

Moreover, this analysis enables regular monitoring of body composition, which is extremely important when implementing lifestyle changes, such as weight reduction, muscle mass building, or improving eating habits. Maintaining a detailed record of body composition analysis allows tracking progress over time and verifying the effectiveness of the measures taken. This documentation also helps the dietitian better understand the patient’s individual needs and tailor a personalized action plan.

What health-related information can be obtained through a professional body composition analysis at a dietitian’s office? How is body composition related to the risk of developing certain diseases or disorders?

Low Body Water Content

If the results of a body composition analysis show low water content in your body, it often indicates low muscle mass and lean body mass. This condition is typically a consequence of a lack of physical activity and a low-energy diet deficient in protein. Reduced muscle mass may also be associated with sarcopenia – a condition characterized by the loss of muscle mass, strength, and function, which commonly occurs as a result of aging and physical inactivity. On the other hand, low water content can also result from excessive fluid loss due to intense sweating, diarrhea, or vomiting, as well as insufficient fluid intake, leading to dehydration.

Low Protein Content in the Body

The protein content in the body is closely linked to muscle mass and water levels, which is why these parameters should be interpreted together. Protein levels below the norm may indicate low muscle mass and poor nutritional status. In such cases, it is crucial to identify the underlying cause, which may include a nutrient-deficient, low-energy diet, lack of physical activity, sarcopenia, or a chronic medical condition.

Low Mineral Content

Mineral content below the norm indicates an increased risk of osteopenia and osteoporosis. If you notice a reduced level of minerals, consider undergoing a specialized bone mineral density test to assess the condition of your bones in detail and determine whether your bone mass is within the normal range. Many factors can contribute to low mineral content, including age, low muscle mass, lack of physical activity, a diet deficient in calcium, and vitamin D3 deficiency.

Excess Body Fat

In cases of an abnormal ratio of fat tissue to muscle tissue, which is often visually apparent with overweight or obesity, identifying this imbalance allows for a clear assessment of the scale of the problem. Overweight and obesity, which are recognized as lifestyle diseases, are often accompanied by other conditions and disorders, such as insulin resistance, type 2 diabetes, hypertension, coronary artery disease, atherosclerosis, and lipid disorders.

In cases where body weight falls within general norms (e.g., based on the BMI index), body composition analysis performed using a BIA analyzer can reveal so-called hidden obesity. One of the key indicators of this analysis is the percentage of body fat, which allows for an accurate assessment of fat tissue levels in the body, regardless of overall weight. This situation typically occurs when a patient has a high proportion of body fat (both subcutaneous and visceral) combined with low muscle mass.

Elevated levels of visceral fat, which is the excess fat surrounding internal organs (such as the liver, heart, and pancreas), increase the risk of cardiovascular diseases and metabolic disorders, including diabetes.

Image 1: Body Composition Analysis Two individuals with the same body weight and identical height can differ significantly in body composition. The first person, with a higher proportion of muscle mass (and consequently a lower percentage of body fat), benefits from a higher resting metabolic rate, greater strength, and better physical performance. The second person, with a predominance of body fat (and lower lean body mass), despite having the same weight, may be at a higher risk of developing diseases such as type 2 diabetes, hypertension, or metabolic syndrome. This illustration highlights why body composition measurements are a critical tool in dietetics and sports medicine. It demonstrates that the number on the scale is only one health parameter. Assessing body composition, including the ratio of muscle to fat tissue, is essential for determining overall health, tailoring dietary strategies, and designing an effective training plan.

3. Body Type and Overweight or Obesity

The results of a body composition analysis provide valuable insights into the proportions of muscle mass, fat mass, and overall body weight, enabling an assessment of body composition and the risk of overweight or obesity. In dietetics, professional body composition analysis allows for a detailed evaluation of body composition compared to established norms, facilitating the assessment of individuals with both a healthy body weight and those with excessive weight. This method offers a deeper understanding of how a person’s body composition influences their health and physical condition.

Based on the measurements of skeletal muscle mass and fat mass, body types can generally be categorized into three main types:

Ideal Shape – Type “I”

This body type is characterized by an appropriate balance between fat mass, muscle mass, and overall body weight. In this case, muscle mass is sufficient to ensure proper body function, while the amount of fat mass falls within healthy ranges. Body composition analysis identifies this body type as balanced. Individuals with this build typically do not require significant lifestyle changes; maintaining their current dietary habits and level of physical activity is usually sufficient to sustain their health and well-being.

Fatty Shape – Type “C”

This body type is characterized by an appropriate balance between fat mass, muscle mass, and overall body weight. In this case, muscle mass is sufficient to ensure proper body function, while the amount of fat mass falls within healthy ranges. Body composition analysis identifies this body type as balanced. Individuals with this build typically do not require significant lifestyle changes; maintaining their current dietary habits and level of physical activity is usually sufficient to sustain their health and well-being.

Well-Defined Shape – Type “D”

This body type is distinguished by a high muscle mass relative to fat mass. Individuals with a well-shaped physique are often characterized by a high level of physical activity, and professional body composition analysis in dietetics helps them optimize further actions. Bioelectrical impedance measurement, which assesses the electrical resistance of body tissues, indicates that these individuals have low body fat levels and high muscle mass, resulting in a healthy, proportionate, and strong physique. People with a well-shaped body often have better predispositions for engaging in sports.

The Importance of Body Type Analysis

Identifying body type based on body composition analysis results allows not only for assessing the current state of the body but also for planning appropriate actions. Both for individuals with an overweight shape and those striving to achieve an ideal physique, proper interpretation of the ratio of body fat to muscle mass enables the implementation of effective lifestyle changes, dietary adjustments, and physical activity strategies.

Regular monitoring of parameters such as skeletal muscle mass and body fat mass using analyzers allows individuals with varying levels of physical activity to better understand their body weight. Assessing body composition enables tracking progress and more effectively planning actions toward achieving health and optimal physical condition.

Image 2. Muscle-Fat Analysis as the Key to Understanding Body Composition Results
Professional body composition analysis in dietetics allows for accurate measurement of body weight, skeletal muscle mass, and body fat mass, as well as a precise evaluation of the ratio of body fat to other components. Based on body composition analysis, detailed information about muscle tissue quantity and health norms can be obtained, enabling the planning of actions to support health and physical fitness. Dietitians use these measurement results to optimize nutritional and training plans. Assessing body composition also helps determine the correct relationship between body weight and individual parameters, enhancing the understanding of metabolic and body-shaping processes.

4. The Role of Body Composition Analysis in Weight Loss

Body composition analysis, which provides detailed information about body fat, muscle mass, water, and minerals, is one of the key tools in the weight loss process at every stage. Why? At the very beginning of this journey, it reveals more than just “dry numbers” like body weight in kilograms – it offers a fuller picture of your health status. The analysis will help you define your weight loss goals and make it easier to tailor your dietary and training plan to your specific needs. For instance, if you are overweight and also have low protein levels in your body, you will need a different set of exercises and diet compared to someone with grade II obesity who has a normal muscle mass level. Regularly repeated body composition analysis during weight loss allows you to monitor progress and see how your body “responds” to the changes introduced. This makes it much easier to adjust the weight loss plan if modifications are needed.

Visible positive changes from one analysis to another, both in body mass composition (a reduction in body fat and an increase in muscle mass) and improvements in other parameters, will also serve as strong motivation to continue working on yourself. It is important to emphasize that weight loss does not always equal fat loss. A rapid drop in weight, especially at the beginning of a weight loss journey, may primarily result from water loss. Insufficient caloric intake, inadequate protein consumption, and a lack of exercise can lead to the body drawing energy from muscle tissue rather than fat. While body weight will decrease in such a scenario, it does not reflect true fat loss. Conversely, as a result of exercise and muscle growth, total body weight might remain the same or even slightly increase, while the amount of body fat decreases in favor of muscle mass.

BIA Body Composition Analysis for Athletes

Although body composition analysis is often discussed in the context of weight loss, it is equally valuable in modern sports nutrition. For athletes, detailed information obtained through bioelectrical impedance analysis (BIA) significantly aids in optimizing both diet and training. When performed regularly, this analysis allows for precise monitoring of progress. Maintaining control over body composition is critical for improving performance and, depending on the specific sport, enhancing strength, speed, or endurance. When creating a personalized dietary program based on body composition analysis, we take into account several key factors, including energy requirements, overall health, and, of course, the type of sport you practice.

Monitoring Body Composition and Training

If you engage in strength training and aim to build muscle mass while controlling or reducing body fat, BIA (Bioelectrical Impedance Analysis) will help you achieve an optimal body composition. This, in turn, translates into maximized training and physique results. A body composition analysis using a BIA device allows for a precise measurement of your baseline muscle mass and helps monitor changes throughout your training cycles. The analysis of body composition history is also extremely valuable for endurance athletes, as it facilitates maintaining an optimal weight. Therefore, BIA is an indispensable tool for anyone who takes their training seriously. It not only enables you to track progress but also helps adjust your training and dietary plans to achieve the best possible results. Regular use of BIA allows for a more conscious and effective approach to training, which will undoubtedly lead to better outcomes and greater satisfaction with your achieved goals.

5. What is Metabolic Age?

In body composition analysis results, the metabolic age often appears as a key indicator that attracts considerable interest but also requires proper interpretation. Metabolic age is an approximate value that compares how your body composition – particularly the percentage of body fat, muscle mass, and basal metabolic rate (BMR) – aligns with the average values for individuals of your biological age.

If your metabolic age is lower than your actual age, it indicates that your body composition is optimal, with low body fat levels and an efficiently functioning metabolism. Conversely, a higher metabolic age may suggest excess body weight, high body fat percentage, lack of physical activity, or poor dietary habits.

Remember that metabolic age is only an approximate indicator and does not account for all aspects of health and physical fitness. While it can be helpful for assessing your general condition, it should not be treated as the sole determinant of health. The key lies in the detailed body composition parameters and their proper interpretation by a dietitian or specialist. Your health depends on many factors, and metabolic age serves merely as a guideline for how your body is coping with your current lifestyle. To gain a fuller picture, it’s important to regularly monitor your body composition and seek professional support to implement beneficial changes.

6. How to Prepare for a Body Composition Analysis?

The accuracy of measurements performed using the InBody analyzer can reach up to 98% compared to DEXA, which is regarded as the gold standard for body composition assessment. To achieve such precision, proper preparation for the test is essential.

Avoid physical activity for at least 12 hours before the analysis. Attending the test fasting, if possible, helps ensure optimal conditions. Emptying your bladder beforehand is important, as a full bladder can affect the results. Refrain from taking a shower or bath immediately before the test. Wear light clothing, and for the most accurate measurement, the test should ideally be conducted in underwear after removing all metal objects. Proper preparation guarantees the most precise and reliable results from the body composition analysis.

7. Limitations of Body Composition Analysis with the Analyzer

Although body mass measurement using the bioelectrical impedance analysis (BIA) method is one of the most popular ways to assess body composition, it is important to be aware of certain limitations associated with its use in specific patient groups. The BIA method requires the user to be in contact with electrodes, which measure the electrical resistance of body tissues. For individuals who cannot be positioned on a standard analyzer, such as patients without limbs or paralyzed individuals, conducting the test can be challenging or even impossible.

Standard BIA devices assume an even distribution of limbs on the analyzer platform and precise placement of electrodes, which ensures accurate results. In cases of individuals with limb amputations or mobility difficulties, the inability to position the body correctly can result in an incomplete or inaccurate body composition measurement. Additionally, for such patients, data related to the segmental analysis of tissues (e.g., distribution of fat or muscle mass in the limbs) may be incomplete or distorted.

Patients with asymmetry in body composition caused by paralysis or muscle atrophy in specific areas of the body may also not achieve reliable results using a standard analyzer. BIA analyzers rely on averaged population data and a uniform body structure model, making it difficult to obtain precise body composition measurements in these cases.

For individuals facing such challenges, it is possible to use more advanced devices or techniques that offer greater flexibility to meet the patient’s needs. Specialized methods for body composition analysis, such as DEXA, can serve as a viable alternative, providing more accurate and detailed measurements.

Photo 3. A medical body composition analyzer operates by measuring the electrical resistance of body tissues, enabling a precise assessment of body composition, including measurements of body weight, muscle mass content, and the percentage of body fat. The test not only determines whether a patient has a healthy body weight but also provides detailed data on the chemical composition of the body. With the ability to track body composition history and a short testing time (the analysis takes less than 1 minute), the measurement results can be quickly and conveniently used to monitor progress and adjust dietary and training plans.

8. Contraindications for Body Composition Analysis Using Bioelectrical Impedance Analysis (BIA)

Although body composition analysis using the bioelectrical impedance analysis (BIA) method is a safe, quick, and non-invasive test, there are certain contraindications that must be strictly considered. These contraindications pertain to situations where performing measurements with a medical body composition analyzer could pose a potential health risk to the patient or affect the accuracy of the results. Contraindications to body composition analysis are related to the measurement’s nature, which involves using an alternating electrical current passed through body tissues to determine their properties.

Absolute contraindications for body composition analysis:

  1. Pacemakers – The electrical current used in BIA may interfere with the operation of the device.
  2. Electrical devices in the abdominal cavity, such as the “Ability” system used to treat urinary incontinence.
  3. Metal implants in the body, which may disrupt the flow of electrical current and result in inaccurate measurements.
  4. Pregnancy – While the impact of BIA testing on a developing fetus is not definitively confirmed, it is recommended to avoid such measurements in pregnant women for safety reasons.

When can a body composition analyzer be used?

Certain metal and electronic elements within the patient’s body do not constitute contraindications, as they do not affect the results of body composition analysis in practice. These elements include:

  • Dental implants, crowns, and prostheses.
  • Orthodontic braces.
  • Cochlear implants.
  • Bone fixation screws and plates.
  • Insulin pumps.

9. What Are the Norms in Body Composition Analysis?

Reference norms used in body composition analysis allow for the assessment of whether individual parameters fall within healthy ranges for the tested person. By comparing results to these norms, areas requiring improvement can be identified, such as excess body fat or a deficiency in muscle mass, enabling effective planning of dietary and training interventions. The norms for body composition analysis vary depending on age, sex, physical activity levels, and individual body characteristics.

During bioelectrical impedance analysis (BIA), the results are interpreted as follows:

  • Percentage of body fat (PBF): Healthy body fat levels are considered to be 18% to 28% in women and 10% to 20% in men. Values above or below these ranges may indicate potential health concerns such as obesity or malnutrition.
  • Muscle mass: The optimal level of muscle mass depends on gender and age. A higher muscle content reflects good physical condition and positively impacts metabolism.
  • Total body water (TBW): Maintaining proper hydration levels, approximately 45–60% of body weight, is critical for health. Deviations may signal dehydration or excessive fluid retention.
  • Visceral fat area (VFA): Excessive visceral fat increases the risk of metabolic and cardiovascular diseases.

In children and adolescents, the interpretation of body composition norms considers percentile charts, which determine whether a specific result falls within the normal range for a given age group and sex. These charts are particularly useful for monitoring physical development and early detection of abnormalities such as overweight, obesity, or undernutrition.

When interpreting results, body composition norms are often presented as reference ranges, allowing for a clear determination of whether a measurement falls within healthy boundaries. This makes it easier to identify areas for improvement, such as reducing body fat, increasing muscle mass, or improving hydration levels.

It is important to note that these norms are only an indicator, and the final interpretation of results should take into account the individual needs of the patient and their health context. For this reason, it is advisable to consult a dietitian or specialist, who can adjust dietary and training plans based on the results of the body composition analysis.

10. Body Composition Analysis Results – Consultations with a Dietitian

The results of a body composition analysis – including fat mass, body fat percentage, visceral fat, muscle mass, lean body mass, and body water content – are not just numbers; they are valuable data that require proper interpretation. This is why body composition analysis plays a key role in dietetics, and a consultation with a dietitian is essential. A dietitian’s knowledge and experience provide the added value, helping you make the best use of the obtained data.

A dietitian will not only help you understand the results but also consider your body composition history, showing you how to use this information to improve your health, achieve better fitness, and meet your body goals.

During a consultation with a dietitian, you will receive:

  • Individual recommendations tailored to your health needs and goals,
  • A dietary and/or training plan based on your analysis results and lifestyle,
  • Progress evaluation, helping you track the effects of implemented changes and maintain motivation.

Remember, body composition analysis is a tool – the key to success lies in how you use it. With the professional support of a dietitian, you gain confidence that the steps you take are not only effective but also safe and aligned with your individual needs.

11. How to Book a Body Composition Analysis at the Made By Diet® Nutrition Clinic?

Would you like to schedule a body composition analysis at our clinic? Simply visit the “Offer” section and book your body composition analysis, selecting a convenient date and time. Our offices are located in easily accessible locations such as Warsaw, Kraków, and Gdańsk, so you can choose the one closest to your home. If you have any questions or concerns, we are here to help. Feel free to contact us via email or phone – details can be found here: https://madebydiet.com/en/contact/.

Don’t wait – a body composition analysis in Warsaw, Kraków, or Gdańsk is the first step toward better understanding your body and effectively achieving your health goals!

Body Composition Analysis