Bioelectrical Impedance Accuracy

C O N T E N T S:


  • Widen EM, Strain G, King WC, Yu W, Lin S, Goodpaster B, et al. Validity of bioelectrical impedance analysis for measuring changes in body water and percent fat after bariatric surgery.(More…)
  • It uses advanced BIA, or Bioelectrical Impedance Analysis, to measure body fat, body water, bone mass and BMI, or Body Mass Index.(More…)


  • Chiplonkar S, Kajale N, Ekbote V, Mandlik R, Parthasarathy L, Khadilkar V, et al. Validation of bioelectric impedance analysis against dual-energy X-ray absorptiometry for assessment of body composition in Indian children aged 5 to 18 years.(More…)


Bioelectrical Impedance Accuracy
Image Courtesy:
description: Percentage of total body fat as estimated by three automatic …


Widen EM, Strain G, King WC, Yu W, Lin S, Goodpaster B, et al. Validity of bioelectrical impedance analysis for measuring changes in body water and percent fat after bariatric surgery. [1] Most use Bioelectrical Impedance Analysis, in which an electrical signal is sent through the body to determine the percent of different kinds of tissues (each has a different conductance). [2] Prins M, Hawkesworth S, Wright A, Fulford a JC, LM a J, Prentice a M, et al. Use of bioelectrical impedance analysis to assess body composition in rural Gambian children. [1] Bm A, Heitmann BL. The use of bioelectrical impedance analysis for body composition in epidemiological studies. [1] Shafer KJ, Siders WA, Johnson LK, Lukaski HC. Validity of segmental multiple-frequency bioelectrical impedance analysis to estimate body composition of adults across a range of body mass indexes. [1] We evaluate the accuracy of whole body muscle mass (WBMM) and appendicular skeletal muscle mass (ASMM) assessed by bioelectrical impedance analysis (BIA) using an InBody770 machine (InBody, Seoul, Korea) referenced to dual-energy X-ray absorptiometry (DXA) in 507 people (mean age 63.7 10.8 years, body mass index (BMI) 25.2 3.5 kg/m). [3] Comparison between Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analyses for Accuracy in Measuring Whole Body Muscle Mass and Appen. – PubMed – NCBI Warning: The NCBI web site requires JavaScript to function. more. [3] Bosy-Westphal A, Later W, Hitze B, Sato T, Kossel E, Glr C-C, et al. Accuracy of bioelectrical impedance consumer devices for measurement of body composition in comparison to whole body magnetic resonance imaging and dual X-ray absorptiometry. [1] Resende CMM, Camelo Jior JS, Vieira MNCM, Ferriolli E, Pfrimer K, PerdonGSC, et al. Body composition measures of obese adolescents by the deuterium oxide dilution method and by bioelectrical impedance. [1] For the most part, bioelectrical impedance analysis has proven to be a fairly accurate method for estimating body fat in a laboratory setting. [4] Li YC, Li CI, Lin WY, Liu CS, Hsu HS, Lee CC, et al. Percentage of body fat assessment using bioelectrical impedance analysis and dual-energy X-ray absorptiometry in a weight loss program for obese or overweight Chinese adults. [1] Srichan W, Yamborisut U, Kijboonchoo K, Thasanasuwan WA. Comparison of bioelectrical impedance analysis with deuterium dilution technique for body fat assessment in school-age children. [1]

Lee L-W, Liao Y-S, Lu H-K, Hsiao P-L, Chen Y-Y, Chi C-C, et al. Validation of two portable bioelectrical impedance analyses for the assessment of body composition in school age children. [1] Dehghan M, Merchant AT. Is bioelectrical impedance accurate for use in large epidemiological studies? Nutr J. 2008;7:26. [1] Wang L, Hui SS. Validity of four commercial bioelectrical impedance scales in measuring body fat among Chinese children and adolescents. [1] They have several high-quality bioelectrical impedance devices that offer a variety of functions. [2] The resistance encountered as the current goes through the fat tissue is called bioelectrical impedance. [4]

Yanovski SZ, Hubbard VS, Heymsfield SB, Lukaski HC. Bioelectrical impedance analysis in body composition measurement: National Institutes of Health Technology Assessment Conference Statement. [5] Lukaski HC, Bolonchuk WW, Siders WA, Hall CB. Body composition assessment of athletes using bioelectrical impedance measurements. [5]

Bioelectrical impedance analysis (BIA) is a non-invasive technique widely used in body composition assessment, nutritional status, and hydration status, all considered areas of interest to monitor general health and well-being, but also training and performance levels. [5] Savastano S, Belfiore A, Di Somma C, Mauriello C, Rossi A, Pizza G et al. Validity of bioelectrical impedance analysis to estimate body composition changes after bariatric surgery in premenopausal morbidly women. [5] Marini E, Sergi G, Succa V, Saragat B, Sarti S, Coin A, Manzato E, Buffa R. Efficacy of specific bioelectrical impedance vector analysis (BIVA) for assessing body composition in the elderly. [5] Saragat B, Buffa R, Mereu E, De Rui M, Coin A, Sergi G et al. Specific bioelectrical impedance vector reference values for assessing body composition in the Italian elderly. [5]

Marini E, Buffa R, Saragat B, Coin A, Toffanello ED, Berton L et al. The potential of classic and specific bioelectrical impedance vector analysis for the assessment of sarcopenia and sarcopenic obesity. [5] Buffa R, Mereu E, Comandini O, Ibanez ME, Marini E. Bioelectrical impedance vector analysis (BIVA) for the assessment of two-compartment body composition. [5] Bonuccelli A, Marzatico F, Stesina G, Stefanini L, Buonocore D, Rucci S et al. Bioelectrical impedance vector analysis (BIVA) to evaluate seasonal variations in body composition of elite soccer players. [5] Carrasco-Marginet M, Castizo-Olier J, Rodriguez-Zamora L, Iglesias X, Rodriguez FA, Chaverri D et al. Bioelectrical impedance vector analysis (BIVA) for measuring the hydration status in young elite synchronized swimmers. [5] Citation: Castizo-Olier J, Irurtia A, Jemni M, Carrasco-Marginet M, Ferndez-Garc’a R, Rodr’guez FA (2018) Bioelectrical impedance vector analysis (BIVA) in sport and exercise: Systematic review and future perspectives. [5] Bioelectrical impedance vector analysis (BIVA) is a general concept that includes all methodologies used in the analysis of the bioelectrical vector, whereas the “classic” BIVA is a patented methodology included among these methods of analysis. [5] This general concept include the whole-body assessment methods “classic” BIVA and “specific” BIVA (which is a methodology that tries to overcome some limitations of “classic” BIVA), and the localised bioelectrical impedance vector analysis (which is a method proposed for the identification and follow-up of muscle injuries). [5] It is important to mention that the present review distinguished between the term “classic” BIVA (commonly termed BIVA in the literature), the methodology patented by Pillon and Piccoli, and a more general concept that include all methodologies using vector analysis, i.e. bioelectrical impedance vector analysis (BIVA in the present review). [5] Lukaski HC, Piccoli A. Bioelectrical impedance vector analysis for assessment of hydration in physiological states and clinical conditions. [5] Lukaski HC, Hall CB, Siders WA. Assessment of change in hydration in women during pregnancy and postpartum with bioelectrical impedance vectors. [5] Lukaski HC, Kyle UG, Kondrup J. Assessment of adult malnutrition and prognosis with bioelectrical impedance analysis: phase angle and impedance ratio. [5] Chertow GM, Lowrie EG, Wilmore DW, Gonzalez J, Lew NL, Ling J et al. Nutritional assessment with bioelectrical impedance analysis in maintenance hemodialysis patients. [5]

Products feature direct segmental multi-frequency bioelectrical impedance analysis (DSM-BIA) and an eight-point tactile electrode system to measure an individual’s body composition without the use of empirical data. [6] Barbosa-Silva MC, Barros AJ. Bioelectrical impedance analysis in clinical practice: a new perspective on its use beyond body composition equations. [5] Baldwin CE, Paratz JD, Bersten AD. Body composition analysis in critically ill survivors: a comparison of bioelectrical impedance spectroscopy devices. [5] Segal KR. Use of bioelectrical impedance analysis measurements as an evaluation for participating in sports. [5] The other is bioelectrical impedance analysis which uses electrical resistance. [7] Walter-Kroker A, Kroker A, Mattiucci-Guehlke M, Glaab T. A practical guide to bioelectrical impedance analysis using the example of chronic obstructive pulmonary disease. [5] Lukaski HC. Biological indexes considered in the derivation of the bioelectrical impedance analysis. [5] Lukaski HC. Applications of bioelectrical impedance analysis: a critical review. [5] Lukaski HC, Siders WA. Validity and accuracy of regional bioelectrical impedance devices to determine whole-body fatness. [5] Lukaski HC, Bolonchuk WW, Hall CB, Siders WA. Validation of tetrapolar bioelectrical impedance method to assess human body composition. [5] Lukaski HC, Moore M. Bioelectrical impedance assessment of wound healing. [5] Gerth WA, Montgomery LD, Wu Y-C. A computer-based bioelectrical impedance spectroscopic system for noninvasive assessment of compartmental fluid redistribution., Conf Proc Third Annual IEEE Symposium on Computer-Based Medical Systems. 1990;446-456. [5] Melchiorri G, Monteleone G, Andreoli A, Calla C, Sgroi M, De Lorenzo A. Body cell mass measured by bioelectrical impedance spectroscopy in professional football (soccer) players. [5] Alternative techniques such as the measure of the phase angle (PA) or the “classic” bioelectrical impedance vector analysis (“classic” BIVA) emerged to overcome the above-mentioned BIA limitations, basing their main strength on the use of raw impedance parameters. [5] Generally, the fat scales make use of bioelectrical impedance to send a very low quantity of current across the lower half of the body and then measure the speed of current thereafter based upon a formula in the scale circuit the body fat is calculated and shown to you in the scale screen. [8] You can get pretty far with a scale that uses bioelectrical impedance. [9]

Oppliger RA, Nielsen DH, Shetler AC, Crowley ET, Albright JP. Body composition of collegiate football players: bioelectrical impedance and skinfolds compared to hydrostatic weighing. [5] Fukuda DH, Stout JR, Moon JR, Smith-Ryan AE, Kendall KL, Hoffman JR. Effects of resistance training on classic and specific bioelectrical impedance vector analysis in elderly women. [5] Bronhara B, Piccoli A, Pereira JC. Fuzzy linguistic model for bioelectrical impedance vector analysis. [5] Bioelectrical impedance (Z)–i.e. the tissues opposition to the electric current flow–, the vector sum of the resistance (R)–i.e. the major resistance to the current through intra- and extracellular ionic fluids–and the reactance (Xc)–i.e. the additional opposition due to the capacitive elements such as cell membranes, tissue interfaces, and non-ionic substances. [5] O’Brien C, Young AJ, Sawka MN. Bioelectrical impedance to estimate changes in hydration status. [5] Kyle UG, Bosaeus I, De Lorenzo AD, Deurenberg P, Elia M, Gez JM et al. Bioelectrical impedance analysis-part I: review of principles and methods. [5] Kyle UG, Bosaeus I, De Lorenzo AD, Deurenberg P, Elia M, Manuel Gomez J et al. Bioelectrical impedance analysis-part II: utilization in clinical practice. [5]

Proper testing procedures to control factors that may affect the bioelectrical signal, as well as valid and reliable phase-sensitive measuring devices and appropriate disposables, are key to obtain more valid and precise impedance measurements. [5] Norman K, Stobaus N, Pirlich M, Bosy-Westphal A. Bioelectrical phase angle and impedance vector analysis–clinical relevance and applicability of impedance parameters. [5]

It uses advanced BIA, or Bioelectrical Impedance Analysis, to measure body fat, body water, bone mass and BMI, or Body Mass Index. [10] Bioelectrical Impedance Analysis has been shown to be fairly accurate when estimating body fat. [11] A correlation of body fat to a total body weight is defined by bioelectrical impedance analysis (BIA). [12] The Ozeri Touch Digital Bathroom Scale combines advanced algorithms with bioelectrical impedance analysis (BI), incorporating a person’s age, height, gender and weight to accurately calculate advanced measurements. [13] Bioelectrical impedance method is frequently used for assessing skeletal muscle mass. [14] Monitoring thoracic fluid content using bioelectrical impedance spectroscopy and Cole modeling. [15]


Chiplonkar S, Kajale N, Ekbote V, Mandlik R, Parthasarathy L, Khadilkar V, et al. Validation of bioelectric impedance analysis against dual-energy X-ray absorptiometry for assessment of body composition in Indian children aged 5 to 18 years. [1] Wickramasinghe V, Lamabadusuriya S, Cleghorn G, Davies P. Assesment of body composition in Sri Lankachildren: validation of a biolectrical impedance prediction equation. [1]

Some devices use two or more frequencies to measure the impedance and advanced algorithms to determine body fat and water content. [4]

Note: if you are a pregnant lady or a person with some kind of electrical implants in the body such as pacemakers, defibrillator etc then you are not recommended to use the fat scales for your own good because these scales use electrical impedance which may interfere with your devices in the body. [8] The majority of the investigations used single-frequency impedance devices (50 kHz), two used multiple frequency bioimpedance analysers and one used both types of devices. [5] New specific tolerance ellipses for each sport, sex, age and race, should be generated and it should be investigated whether they can be used for the classification of an individual vector (in terms of hydration status, body composition and sport performance level) and if they represent significant hydration changes (that compromise health or performance) or target zones of impedance vectors for athletes. [5] Piccoli A. Bioelectric impedance vector distribution in peritoneal dialysis patients with different hydration status. [5] Micheli ML, Pagani L, Marella M, Gulisano M, Piccoli A, Angelini F et al. Bioimpedance and impedance vector patterns as predictors of league level in male soccer players. [5] According to this, Piccoli et al. also found the mean impedance vector of bodybuilders almost completely outside the 95% tolerance ellipse of the reference population. [5]

For instance, after descent to sea level, the impedance vector underwent a significant shortening and returned close to baseline values. [5] In accordance with De Lorenzo et al., variations in fluid distribution would change the impedance locus and, consequently, the characteristic frequency (Fc), defined as the frequency at which Xc presents a greater value and that it is close to 50 kHz. [5] Lofgren B. The electrical impedance of a complex tissue and its relation to changes in volume and fluid distribution; a study on rat kidneys. [5] Multiple validation studies demonstrated solid relationship between bodily impedance and fluid volume (e.g. compared to isotope dilution), but their validity and accuracy of prediction are population-specific. [5]

The Seca mBCA 514 Medical Body Composition Analyzer offers clinically validated precision for quickly and intuitively calculating 8 point Bioelectric Impedance Analysis (BIA) measurements in an easily analyzable format that can be transmitted wirelessly to EMR interfacing systems. [16] Only impedance is used to determine your body composition results; no empirical estimations such as gender and age are used or required to predict your body composition. [17]

In ecological protocols, it should be taken into account that in the case that the measurement is performed < 1 hour after the food/drink intake, this ingestion will have a minimal effect on the impedance value. [5]

Three studies analysed short-term variations in the hydration status evoked by exercise/training through whole-body measurements, eleven assessed whole-body body composition changes induced by long-term exercise, four compared athletic groups or populations using the whole-body assessment, and two analysed bioelectrical patterns of athletic injuries or muscle damage through localised bioimpedance measurements. [5] These studies consisted in single cross-sectional protocols aiming to identify bioelectrical patterns of change depending on the injury type and grade, and longitudinal protocols aiming at assessing bioimpedance vector sensitivity to monitor injuries and their recovery. [5] BIVA studies analysing bioelectrical changes induced by injury. [5] In studies assessing BIVA after exercise, adequate protocols of cold water application before testing with different duration and temperatures in order to reduce the sources of error in bioelectrical measurements should also be investigated, adapting the protocol to the type, intensity and duration of the exercise. [5] BIVA studies analysing bioelectrical differences between populations. [5]

Table 5 compiles the information about the baseline bioelectrical parameters and vector position of the participants analysed in the studies included in the present review. [5] Most studies used whole-body electrode distribution, one used localised electrode distribution to analyse injury-induced bioelectrical changes, and two combined the standard whole-body and the localised techniques. [5] Lastly, significant relationships were found between changes in bioelectrical variables (R/h and Xc/h) and changes in the following hydration biomarkers along measurements performed at altitude and at sea level: BM, urine volume, P osm, serum Na +, K +, Cl – and glucose, and urine osmolar excretion. [5] The follow-up of the injury identified bioelectrical patterns of changes similar to those in wound healing and an increase of R and Xc values were observed to values close to pre-injury. [5] The measurement after exercise should be performed once the electrolytes of the skin have been removed with a shower and the skin temperature, cutaneous blood flow and bioelectrical parameters have stabilised to basal values. [5]

As for the bioelectrical parameters, especially Xc, it will be difficult to obtain conclusions as valid and accurate as possible concerning to their patterns until the behaviour of cells in the human body is not well explained using simulated circuit models (in series, in parallel or mixed), for both homeostatic and non-homeostatic conditions. [5] With regard to the body composition assessment, it should be further investigated the effect on the bioelectrical signal of the FM, fluid overload and cross-sectional areas of the body. [5] These results are in agreement with other studies which also found significant bioelectrical differences in the pre-season, hypothesising that they were due to fluid expansion. [5] These types of studies ( Table 3 ) consist of single measure, cross-sectional protocols aiming to characterise sporting group samples in terms of bioelectrical data. [5] Variables as the type of sport and training strategy should be taken into account when monitoring along a season, since they might influence the bioelectrical measures. [5]

Currently, the relationship between the bioelectrical signal and physiological adaptations induced by different types of exercise remain largely unresolved, especially in how the structure and function of the cell are altered and how these affect the behaviour of R, and in particular Xc. [5] Also intra-group comparisons between seasons should be analysed with caution, since inter-seasonal bioelectrical variations could be effected by factors such as biological maturation. [5]

This method proposes a correction of bioelectrical values for body geometry and it has proven to be effective in identifying the relative proportion of FM in adults and elderly. [5] This standardisation should consider the muscle length instead of the body height to normalise the bioelectrical values, since differences in the proportionality between subjects may lead to greater errors. [5]

“Specific” BIVA, a method which proposes a correction of bioelectrical values for body geometry, emerges as the key to overcome “classic” BIVA limitations regarding the body composition assessment. [5] Validation studies of “classic” BIVA have shown a significant association of bioelectrical values with hydration, and nutritional status in clinical conditions. [5] The already mentioned factors FM and fluid overload could compensate the bioelectrical values between both individuals, not being “classic” BIVA (50 kHz) able to detect the differences (e.g. discriminating fluids distribution between compartments, with greater ICW content in athletes). [5]

RANKED SELECTED SOURCES(17 source documents arranged by frequency of occurrence in the above report)

1. (71) Bioelectrical impedance vector analysis (BIVA) in sport and exercise: Systematic review and future perspectives

2. (13)

3. (3) Measure Body Fat With Bioelectrical Impedance Analysis

4. (2) The 7 Best Body Fat Analyzers to Buy in 2018

5. (2) Comparison between Dual-Energy X-ray Absorptiometry and Bioelectrical Impedance Analyses for Accuracy in Measuring Whole Body Muscle Mass and Appen. – PubMed – NCBI

6. (2) best body fat scales 2018- analyse reviews ,pros & cons – healthy o healthy

7. (1) Weight Watchers by Conair™ Glass Body Analysis Bathroom Scale – Bed Bath & Beyond

8. (1) BMI: Everything You Need to Know About Body Mass Index

9. (1) 5 Best Bathroom Scale Reviews of 2018 –

10. (1) COBY Bluetooth Bathroom Digital Scale & Reviews | Wayfair

11. (1) No Deterioration in Clinical Outcomes of Carbon Ion Radiotherapy for Sarcopenia Patients with Hepatocellular Carcinoma

12. (1) Ronald Aarts

13. (1) Seca mBCA 514 Medical Body Composition Analyzer

14. (1) InBody 770 Body Composition Analyzer – InBody USA

15. (1) About the Company – InBody USA

16. (1) Classification of obesity – Wikipedia

17. (1) Setting Personal KPIs – Daniel Gross