Validity of electrical impedance myography to estimate percent body fat: comparison to bio-electrical impedance and dual-energy X-ray absorptiometry

Rassel, Cody R. van; Bewski, Nicole A; O’Loughlin, Erin K.; Wright, Alicia; Scheel, Daniel P; Puig, Lucila; Kakinami, Lisa

doi:10.23736/s0022-4707.18.08505-5

Cited by 5 publications

(11 citation statements)

References 30 publications

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“…Because this calculation requires allowance for (and hence quantification of) overlying soft tissue, percent body fat (%BF) and fat-free mass (FFM) are also calculated for whole body scans, using instrument-specific algorithms [ 11 ]. DXA is regarded as the gold standard [ 12 , 13 ] for bone mass measurement [ 14 ], is one of the most accurate devices for body composition assessment, and is a fast and safe model. However, it should be kept in mind that during a measurement, the shutter opens to allow a beam of radiation to pass through the scanner table and the patient.…”

Section: Introductionmentioning

confidence: 99%

“…The high (equipment) cost involved remains a major limitation to the use of DXA at a clinical level [ 4 , 6 , 12 , 14 , 16 ]. In contrast, the low cost and easy manageability of the (likewise non-invasive) BIA makes it very popular and widely used, especially with large population samples [ 6 , 12 , 13 , 17 ], and mainly by dietitians and personal trainers. The consistency of its physical principle is still controversial as most BIA techniques lack further validity and demonstration of accuracy [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…There are different forms of BIA devices—single and multi-frequency—which can achieve different levels of accuracy [ 11 ]. Moreover, BIA does not provide a direct measurement but rather an estimation of body composition based on predictions obtained from specific populations [ 13 ]. High errors are expected when the sample is different from the pattern [ 8 , 13 , 19 ], and thus BIA validity has yet to be demonstrated [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, BIA does not provide a direct measurement but rather an estimation of body composition based on predictions obtained from specific populations [ 13 ]. High errors are expected when the sample is different from the pattern [ 8 , 13 , 19 ], and thus BIA validity has yet to be demonstrated [ 20 ]. It is important to note that the system is designed to provide an estimation by measuring the resistance of an undetectable electric current passing through the body [ 8 , 13 ], being lower in tissues with high water contents, such as FFM [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…High errors are expected when the sample is different from the pattern [ 8 , 13 , 19 ], and thus BIA validity has yet to be demonstrated [ 20 ]. It is important to note that the system is designed to provide an estimation by measuring the resistance of an undetectable electric current passing through the body [ 8 , 13 ], being lower in tissues with high water contents, such as FFM [ 8 ]. For this reason, the accuracy of the results has many influencing factors, such as hydration, external temperature, caffeine consumption, exercise, and others [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Bioimpedance and Dual-Energy X-ray Absorptiometry Are Not Equivalent Technologies: Comparing Fat Mass and Fat-Free Mass

Lopes¹,

Fontes²,

Tavares³

et al. 2022

IJERPH

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Bioimpedance (BIA) is the most frequently used technology for body composition assessment at a daily clinical level, mostly due to its low price and user-friendly operation. However, many doubts persist regarding its physiological meaning and applicability. The present study aimed to compare one BIA system and the Dual-Energy X-ray Absorptiometry (DXA) for the characterization of body composition in a previously selected cohort of healthy adult participants. A descriptive observational cross-sectional study included a final sample of 121 participants, 93 women and 28 men, with a mean age of 28.26 ± 9.72 years old and a mean body mass index (BMI) of 22.68 ± 3.13 kg/m2. Statistics involved paired t-tests and agreement analysis by the Bland-Altman method. BIA underestimated the percent body fat (%BF) by 5.56% and overestimated Fat-Free Mass (FFM) by 2.90 kg. A strong positive correlation between both technologies was found for FFM (r = 0.980) and the %BF (r = 0.932), but the disagreement was statistically significant (p < 0.001). Although DXA and BIA seem to correlate, these technologies are not congruent. Therefore, the risk of (mis)interpretation and bias is clear with BIA, potentially impacting the nutritional planning of clinical dietitians and the further results of its patients.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Bioimpedance and Dual-Energy X-ray Absorptiometry Are Not Equivalent Technologies: Comparing Fat Mass and Fat-Free Mass

Lopes¹,

Fontes²,

Tavares³

et al. 2022

IJERPH

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Local fat content and muscle quality measured by a new electrical impedance myography device: correlations with ultrasound variables

Longo

Coratella

Rampichini

et al. 2020

European Journal of Sport Science

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The present study investigated the relationship between local fat percentage (SKfat) and muscle quality (MQ) estimated by a new hand-held electrical impedance myography (hEIM) device or derived from ultrasound and strength assessments. The right anterior thigh of 90 healthy participants (mean±SD; age=22.9±2.9 years; 46 men: BMI=23.9 ± 2.4 kgm -2 ; 46 women: BMI=21.1 ± 1.9 kgm -2 ) was scanned by hEIM and ultrasound. Correlations between SKfat, local subcutaneous fat (SUBfat), and echo intensity (EIus) were explored. Correlations between MQ, EIus, quadriceps femoris anatomical cross-sectional area (ACSAQF), knee extensors maximum voluntary isometric torque (T), T/ACSAQF, EIus/SUBfat, and ACSAQF/SUBfat were also assessed. SKfat correlated with SUBfat (r=0.88; p<0.001) and EIus (r=0.64; p<0.001). MQ correlated with EIus (r=-0.66; p<0.001), ACSAQF (r=0.37; p<0.001), EIus/SUBfat (r=0.37; p<0.001), and ACSAQF/SUBfat (r=0.81; p<0.001). Multiple regression analysis showed that SUBfat, EIus, and sex explained 86% of SKfat variance, whereas ACSAQF/SUBfat, sex and EIus explained 75% of MQ variance. In conclusion, high hEIM local fat percentage relates to greater subcutaneous fat and intramuscular non-contractile tissue content. High hEIM muscle quality relates to greater muscle-size:subcutaneous-fat ratio and contractile tissue content. Sex influences the prediction of both parameters. This hEIM device seems to be useful to estimate local thigh composition.

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Features of physical development and somatotype of girls and women involved in fitness

Podrіgalo

Artemieva

Rovnaya

et al. 2019

PPS

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Purpose : Comparative analysis of the physical development features and somatotype of girls and women involved in fitness. Material : The experiment involved 95 girls and women, divided into 2 groups. Group 1 - 48 girls (36.04 ± 0.19) years, Group 2 - 47 women (43.26 ± 0.22) years, (p <0.01). Participants practiced fitness 2-3 times a week. The duration of the training was 60 minutes. It was determined the body mass and body length, wrist circumference, waist and hips circumferences. The TANITA BC 587 analyzer was applied to determine muscle and fat mass, the specific weight of fat tissue, water content, percentage of visceral fat, basal metabolism value, bone mass mineralization. It was calculated the body mass index and the waist-to-hip ratio. The results were evaluated applying the Student's t-test (t) and Rosenbaum (Q) and Wilcoxon - Mann - Whitney (U) criteria. Results : There were no significant differences in body length and body mass. The girls confirmed a less value of hip circumference (t = 2.04, p <0.05) and a tendency to less waist circumference (t = 1.97, p <0.1) in comparison with group 2. The participants of group 2 had a larger wrist circumference (U = 891, p <0.05). According to this parameter, persons with asthenic body type prevailed among participants. Their specific weight was (56.25 ± 7.16)% of group 1 and (53.19 ± 7.28)% of group 2. It was confirmed less absolute body fat content in group 1 (t = 2.09, p <0.05). All participants were characterized by larger muscle mass. There were no differences in this parameter between groups. It was determined the high concentration of specific weight of fat tissue in comparison with age standards. The content of visceral fat was within the age norm. Its content was higher in group 2 (Q = 18, p <0.01). The basal metabolic value was larger in group 2 (Q = 17, p <0.01). The values of bone mass mineralization reflect the correspondence to the body mass of the participants. This parameter did not have significant differences in the groups. The body mass index value in group 1 was within the average interval. In group 2, this index was higher than the standard one. The body mass index in group 1 was significantly lower (t = 2.18, p <0.05). The participants with a body mass index above the norm were (35.42 ± 6.90)% of group 1 and (59.57 ± 7.16)% of group 2. The prevalence of waist-to-hip ratio above the norm was (54.17 ± 7.19)% 1 group and (59.57 ± 7.17)% 2 group, (p> 0.05). Conclusions : it was determined the proximity of the main anthropometric parameters (mass and body length). The girls have lower values of the hip circumference. Persons with asthenic body type prevailed among the participants. Analysis of the indices confirmed the high prevalence of overweight and high risk of developing metabolic syndrome. The application of bio-impedance method confirmed and clarified the results of anthropometric research. The participants demonstrated the increased content of subcutaneous and visceral fat, increasing with age. The water level in the body gradually decreases with age. This is considered as a reflection of age-related physiological changes in metabolism and should be considered in fitness training organizing. Studies have confirmed the informativeness and adequacy of the bio-impedance method.

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Validity of electrical impedance myography to estimate percent body fat: comparison to bio-electrical impedance and dual-energy X-ray absorptiometry

Cited by 5 publications

References 30 publications

Bioimpedance and Dual-Energy X-ray Absorptiometry Are Not Equivalent Technologies: Comparing Fat Mass and Fat-Free Mass

Bioimpedance and Dual-Energy X-ray Absorptiometry Are Not Equivalent Technologies: Comparing Fat Mass and Fat-Free Mass

Local fat content and muscle quality measured by a new electrical impedance myography device: correlations with ultrasound variables

Features of physical development and somatotype of girls and women involved in fitness

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