all have varying amounts of water content, and, as a result, they all differ in terms of electrical conductivity. 903-907, 1989. This method may be of benefit in a field setting, due to its convenience. About Us Charlie has an MSc in Sport and Exercise Nutrition from Loughborough University. 115-122, 2000. Press & Media Sign up here as a reviewer to help fast-track new submissions.
The validity of BIA for one-off measures of body composition.
Height was measured using a standard stadiometer; the subjects’ body positions ensured their head, shoulder blades, buttocks, and heels were touching the board during measurement, recorded in centimeters. Lemieux, D. Prud’homme, C. Bouchard, A. Tremblay and J. P. Despres, “Sex differences in the relation of visceral adipose tissue accumulation to total body fatness.,” American Journal of Clinical Nutrition, vol. Although there have been previous studies that have analyzed the relationship between BMI and BF% [13, 15, 16], none were found to have focused on the relationship between HWDI and BF%. 50, pp. Since FM has a greater resistance to the electrical current compared with FFM, the current may not be able to easily travel through the body to reach all body segments, thereby affecting the validity of the measurement. However, Pearson’s correlation coefficients were found to be low ( for men and for women) when compared to previous studies that utilized other obesity evaluation tools with BF% [16, 18, 19]. In addition, this study is, to our knowledge, the first study to compare different BIA models based on different hip and waist circumferences among men and women against a gold standard measure to capture BF%, testing the accuracy of these practical tools when BF% changes over time or the accuracy of the BIA models when not respecting pretesting procedures.
Method. RHV BIA is here to help you! It is important to note that this analysis utilised DEXA as the reference method, which may also lead to further error, as eluded to earlier in this review (read my article on the use of DEXA scanning for body composition assessment HERE).
11, no. However, it is unknown if some model types (i.e., hand to hand, foot to foot, and hand to foot) are differing in their validity depending on hip and waist circumferences. BIA assumes that the human body is composed of a series of cylinders, uniform in shape, length, cross-sectional area, and with constant conductivity. All 2,771 participants in this study were over 18 years and comprised 64% women with a median age of 52 years (IQR, 43–60) and 36% men with a median age of 60 years (IQR, 47–68). Methodological limitations of BIA may affect the ability of the method to accurately determine body composition.
These were measured following standardized procedures from the American College of Sports Medicine. The main objective of this study was to compare the difference of estimation BF% between three BIA models (i.e., hand to hand, foot to foot, and hand to foot) against the Bod Pod across different hip and waist circumferences.
4, pp. M. E. Franssen, E. P. A. Rutten, M. T. J. Groenen, L. E. Vanfleteren, E. F. M. Wouters and M. A. Spruit, “New reference values for body composition by bioelectrical impedance analysis in the general population: Results from the UK Biobank,” Journal of the American Medical Directors Association, vol. 49, pp. We found that 46% of those classified as obese by their measurement of HWDI were also classified as obese by BF%, and when considering specificity, it was discovered that 71% of those not classified as obese by their measurements of HWDI were also not considered obese by their measurements of BF%. BMI was calculated using the following equation: weight (kg)/height (). Sun et al., [7] validated BIA equations using the four-compartment model and reported that the equation was sufficient for use in epidemiological research studies to assess populations with normal levels of body composition. However, later research found that this equation also failed to out-perform the Tanita manufacturer equation, and resulted in wide limits of agreement [12]. E. Chouinard, D. A. Schoeller, A. C. Watras, R. Randall Clark, R. N. Close and A. C. Buchholz, “Bioelectrical Impedance vs. Four-compartment Model to Assess Body Fat Change in Overweight Adults,” Obesity, vol. This can have wide-ranging implications, from assessing the efficacy of previous dietary and training interventions to making decisions on the correct interventions moving forward. After following the pretesting procedures recommended for BIA measures, BF% was estimated using three BIA models and the Bod Pod. However, this method is too expensive for regular use, particularly in a resource limited country such as Thailand, whereas bioelectrical impedance analysis (BIA) is less expensive and more practical and has been shown to be moderately accurate in comparison to the gold standard method [10, 11]. 3, pp. In addition, eating and strenuous exercise 2-4 hours prior to assessment has also previously been shown to decrease impedance; ultimately affecting the accuracy of the measurement [19]. This is possible simply because different bodily tissues (e.g. Figure 2 shows the relationship between HWDI and BF%. This method may be of benefit in a field setting, due to its convenience.
Hip and waist circumferences were obtained using standard procedures and tertiles were computed. Relationship between (a) mean BMI and age, (b) mean HWDI and age, and (c) mean body-fat percentage and age, stratified by gender, (○) for women and (*) for men. Saunders et al., [18] showed that BIA was not a suitable method of body composition assessment in athletes with abnormal hydration status (e.g. All authors have no conflicts of interest. 15, pp. R. F, “Bioelectrical Impedance Analysis: A review of principles and applications,” Journal of the American College of Nutrition, vol. Height was measured using a standard stadiometer; the subjects’ body positions ensured their head, shoulder blades, buttocks, and heels were touching the board during measurement, recorded in centimeters. 6, pp. quantities of fat mass and fat-free mass) by running a small electrical current through the body. Pearson’s correlation coefficient () = −0.200 () in men and in women. 38-43, 2004.
We used BIA method to estimate BF%. (2018) also looked at the accuracy of BIA to characterize regional body fat distribution and its correlation with anthropometric measurements in a sample of women [10]. There are currently no BIA equations for athletes that have been derived from the criterion four-compartment method (fat mass, total body water, bone mineral mass, residual mass). Bioelectrical impedance analysis was used to measure BF% in 2,771 healthy adult Thais. Similar to hand-held methods, leg-to-leg BIA involves an individual standing on scales with four electrodes situated at each footplate, with a low-level current passed through the lower-body.
Strengths of this study include the use of Bod Pod to estimate BF%, a well-accepted measure as the criterion method in the interpretation of results between different BIA models. due to their variation in water content, the small electrical current passes through the tissues at different speeds. De Lorenzo, “Multicompartment model to assess body composition in professional water polo players,” Journal of Sports Medicine and Physical Fitness, vol. Bioelectrical impedance analyzer (BIA) is an inexpensive and practical tool based on the principle that various body components have more or less water content and thus offer a different resistance to the passage of an electrical current, generating more or less resistance [8]. Total body water (TBW) is estimated, and this estimation is used to calculate fat-free mass. In conclusion, the three BIA models offer a BF% measurement agreeing with the estimation obtained with the Bod Pod with the exception of people having a greater waist or greater hip. 4, pp. 1. Pearson’s correlation coefficients () were calculated to assess the degree of the association between HWDI and BF% in relation to age and gender. Viseth Long, Matthew Short, Spencer Smith, Martin Sénéchal, Danielle R. Bouchard, "Testing Bioimpedance to Estimate Body Fat Percentage across Different Hip and Waist Circumferences", Journal of Sports Medicine, vol. By Charlie Beestone 5, pp. They are very expensive and too large to keep at home and, in the case of the DXA, require a certified room and a trained operator.
Das Herz von bia bee Papeterie schlägt für liebevoll gestaltete, nachhaltig produzierte und in Handarbeit fertiggestellte Papeterie und hüpft bei jeder Bestellung vor Freude. Fat mass was underestimated by 1.6kg, whereas fat-free mass was overestimated by 1.8kg. A few of the most feasible approaches are listed below. seca 210 seca 285 EMR ready measuring station for body and weight. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. A. Weststrate and J. G. A. J. Hautvast, “Changes in fat-free mass during weight loss measured by bioelectrical impedance and by densitometry,” American Journal of Clinical Nutrition, vol. (2018), who looked at a sample only composed of women aged 32-85 years, reported that women having a large waist circumference would be more accurate to estimate with a hand to hand BIA than a foot to foot BIA [10]. Many studies have validated the use of bioimpedance analysis (BIA) to quantify body fat percentage (BF%). Indeed, New-HWDI and BMI screen obesity status were based on only height and weight using a simple calculation. In their analysis, they demonstrated that foot to foot BIA was more accurate with subjects having a large hip circumference (r=0.942, p<0.001), while hand to hand BIA was more accurate with subjects having a large waist circumference (r=0.975, p<0.001). One could use the result given by a BIA apparatus and add 2.48% and be closer to the estimation of the Bod Pod. Measurements were done using three different BIA scales: (1) Hand to hand (OMRON, HBF-306, China): height, weight, age, and sex of the participant were entered. A plethora of research has indicated the importance – and potentially the inability – of standardising BIA measures to sufficiently account for various confounders.
HWDI and BF% were found to be inverse which related to a tendency toward a linear relationship. There is disagreement amongst the limited research available, with only one study suggesting that BIA is suitable for assessing body composition in athletes [15], whereas other research suggests that body fat estimates are much higher in athletes when using the BIA method [16]. We are committed to sharing findings related to COVID-19 as quickly as possible. 64, pp. First commercially available in the mid-1980’s [1], bioelectrical Impedance Analysis (BIA) is an inexpensive and portable piece of body composition testing equipment. In contrast, bone and adipose tissue are dielectric substances and are poor conductors [4]. As a result, the BIA devices tested in this study could be used in some settings. A method for estimating body composition, and in particular body fat. Once this was completed, participants were asked to step on the scale, stand straight, and pull the handles up to their side while the measurement was taken. R. Esco, M. S. Olson, H. N. Williford, S. N. Lizana and A. R. Russell, “The accuracy of hand to hand bioelectrical impedance analysis in predicting body composition in college-age female athletes,” Journal of Strength and Conditioning Research, vol.
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