Validity of Bioelectrical Impedance Analysis to Estimation Fat-Free Mass in the Army Cadets
Open accessAbstract
Background: Bioelectrical Impedance Analysis (BIA) is a fast, practical, non-invasive, and frequently used method for fat-free mass (FFM) estimation. The aims of this study were to validate predictive equations of BIA to FFM estimation in Army cadets and to develop and validate a specific BIA equation for this population. Methods: A total of 396 males, Brazilian Army cadets, aged 17–24 years were included. The study used eight published predictive BIA equations, a specific equation in FFM estimation, and dual-energy X-ray absorptiometry (DXA) as a reference method. Student’s t-test (for paired sample), linear regression analysis, and Bland–Altman method were used to test the validity of the BIA equations. Results: Predictive BIA equations showed significant differences in FFM compared to DXA (p < 0.05) and large limits of agreement by Bland–Altman. Predictive BIA equations explained 68% to 88% of FFM variance. Specific BIA equations showed no significant differences in FFM, compared to DXA values. Conclusion: Published BIA predictive equations showed poor accuracy in this sample. The specific BIA equations, developed in this study, demonstrated validity for this sample, although should be used with caution in samples with a large range of FFM.
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DXA measurements using the current equipment had CV of 0.74%, 0.28%, and 0.26% for FM, BMC, and LST, and TEM of 0.25, 0.02, and 0.25 kg, respectively.
“As described elsewhere, CV for FM, bone mineral content (BMC), and lean soft tissue (LST) using the current equipment were 0.74, 0.28, and 0.26%, respectively. TEM were 0.25, 0.02, and 0.25 kg to FM, BMC, and LST, respectively (32).”
From Development and Cross-Validation of a Predictive Equation for Fat-Free Mass in Brazilian Adolescents by Bioelectrical Impedance (2022) · cites this paper as [32]
Other studies in Brazil for the development of predictive equations by anthropometry and BIA also used ethnically mixed samples, miscegenation, and ethnic differences.
“Other studies carried out in Brazil for the development of predictive equations by anthropometry (60) and BIA (32) also used ethnically mixed samples, miscegenation, and ethnic differences”
From Development and Cross-Validation of a Predictive Equation for Fat-Free Mass in Brazilian Adolescents by Bioelectrical Impedance (2022) · cites this paper as [32]
Two studies on athletes recruited male Brazilian army cadets considered as very active individuals.
“Four studies involved Portuguese male and female participants from different sport disciplines [39, 69, 84, 87], while two studies recruited male Brazilian army cadets [85] considered as very active individuals [103] and adolescents from various sport disciplines [104].”
From High-standard predictive equations for estimating body composition using bioelectrical impedance analysis: a systematic review (2024) · cites this paper as [85]
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- Authors
- Langer, R., Borges, J., Pascoa, M., Cirolini, V., Guerra-Júnior, G., & Gonçalves, E.
- Affiliations
- Universidade Estadual de Campinas (UNICAMP) (BR)
- Growth and Development Laboratory, Center for Investigation in Pediatrics (CIPED), School of Medical Sciences, University of Campinas (UNICAMP), Campinas-SP 13083-887, Brazil
- Corresponding author
- Langer, Raquel
- Venue
- Nutrients
- Publisher
- MDPI AG
- Published
- 2016-03-11
- Volume
- 8
- Issue
- 3
- Pages
- 121
- ISSN
- 2072-6643 (ISSN-L)
- PMC
- PMC4808851
- OpenAlex
- W2295171648
- Cited by
- 44
- References
- 45
- Citations by year
- 2025: 3 · 2024: 3 · 2023: 3 · 2022: 5 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 9 · 2017: 6
- FWCI
- 5.10
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Nutrients (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
- Americanae (AECID Library) (submittedVersion, other-oa)
- Topics
- Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrical and Bioimpedance Tomography
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Keywords
- bioelectrical impedance analysis, prediction equations, equation validation, dual-energy X-ray absorptiometry, army cadets, young men, body composition
- MeSH terms
- Adolescent, Age Factors, Body Composition, Brazil, Cross-Sectional Studies, Humans, Male, Military Personnel, Models, Biological, Predictive Value of Tests, Sex Factors, Reproducibility of Results, Absorptiometry, Photon, Linear Models, Electric Impedance, Young Adult
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