Usefulness of different techniques for measuring body composition changes during weight loss in overweight and obese women

Minderico, Cláudia S.; Silva, Analiza M.; Keller, Kathleen L.; Branco, Teresa; Martins, Sandra; Palmeira, António Labisa; Barata, José; Carnero, Elvis Á.; Rocha, Paulo; Teixeira, Pedro J.; Sardinha, Luís B.

doi:10.1017/s0007114507815789

Cited by 60 publications

(56 citation statements)

References 35 publications

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“…Results from our laboratory have also shown that the BIS device used in the current investigation is a valid measurement tool for determining TBW in healthy females when compared to deuterium oxide (Moon et al 2008). Furthermore, BIS has been used to assess TBW for multi-compartment equations in previous validation studies (Minderico et al 2007;Moon et al 2007;Sardinha et al 2003). Measurement of TBW was taken while the subject was lying in a supine position on a table with arms C308 away from the torso and legs separated.…”

Section: Total Body Watermentioning

confidence: 81%

Estimating body fat in NCAA Division I female athletes: a five-compartment model validation of laboratory methods

et al. 2008

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The purpose of the present study was to determine the validity of various laboratory methods for estimating percent body fat (%fat) in NCAA Division I college female athletes (n = 29; 20 +/- 1 year). Body composition was assessed via hydrostatic weighing (HW), air displacement plethysmography (ADP), and dual-energy X-ray absorptiometry (DXA), and estimates of %fat derived using 4-compartment (C), 3C, and 2C models were compared to a criterion 5C model that included bone mineral content, body volume (BV), total body water, and soft tissue mineral. The Wang-4C and the Siri-3C models produced nearly identical values compared to the 5C model (r > 0.99, total error (TE) < 0.40%fat). For the remaining laboratory methods, constant error values (CE) ranged from -0.04%fat (HW-Siri) to -3.71%fat (DXA); r values ranged from 0.89 (ADP-Siri, ADP-Brozek) to 0.93 (DXA); standard error of estimate values ranged from 1.78%fat (DXA) to 2.19%fat (ADP-Siri, ADP-Brozek); and TE values ranged from 2.22%fat (HW-Brozek) to 4.90%fat (DXA). The limits of agreement for DXA (-10.10 to 2.68%fat) were the largest with a significant trend of -0.43 (P < 0.05). With the exception of DXA, all of the equations resulted in acceptable TE values (<3.08%fat). However, the results for individual estimates of %fat using the Brozek equation indicated that the 2C models that derived BV from ADP and HW overestimated (5.38, 3.65%) and underestimated (5.19, 4.88%) %fat, respectively. The acceptable TE values for both HW and ADP suggest that these methods are valid for estimating %fat in college female athletes; however, the Wang-4C and Siri-3C models should be used to identify individual estimates of %fat in this population.

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Section: Total Body Watermentioning

confidence: 81%

Estimating body fat in NCAA Division I female athletes: a five-compartment model validation of laboratory methods

et al. 2008

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“…This set has been used previously to assess obese women 14 . Subjects were measured in the morning in bathing suits without shoes or any kind of metal in contact with their bodies.…”

Section: Physical Therapy Evaluationsmentioning

confidence: 99%

Metabolic and clinical comparative analysis of treadmill six-minute walking test and cardiopulmonary exercise testing in obese and eutrophic women

Thommazo-Luporini¹,

Jürgensen²,

Castello-Simões³

et al. 2012

Rev. bras. fisioter.

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years were included. Fourteen were allocated to the obese group and 15 to the eutrophic group. Anthropometric measurements and body composition assessment were performed. Results: In both tests, obese women presented with significantly higher absolute oxygen uptake, minute ventilation, and systolic and diastolic blood pressure; they also presented with lower speed, distance walked, and oxygen uptake corrected by the weight compared to eutrophics. During the maximal exercise test, perceived dyspnea was greater and the respiratory exchange ratio was lower in obese subjects compared to eutrophics. During the submaximal test, carbon dioxide production, tidal volume, and heart rate were higher in obese subjects compared to eutrophic women. When analyzing possible correlations between the CPX and the tread6MWT at peak, there was a strong correlation for the variable heart rate and a moderate correlation for the variable oxygen uptake. The heart rate obtained in the submaximal test was able to predict the one obtained in the maximal test. Bland-Altman plots demonstrated the agreement between both tests to identify metabolic and physiological parameters at peak exercise. Conclusions:The six-minute walking test induced ventilatory, metabolic, and cardiovascular responses in agreement with the maximal testing. Thus, the six-minute walking test proves to be important for functional evaluation in the physical therapy routine.Keywords: obesity; exercise test; physical fitness; physical therapy. ResumoContextualização: A reduzida tolerância ao exercício está relacionada à diminuída capacidade funcional consequente da obesidade.Objetivos: Analisar e comparar respostas cardiopulmonares, metabólicas e subjetivas durante um teste de esforço cardiopulmonar e um teste de caminhada de seis minutos na esteira em mulheres obesas e eutróficas. Métodos: Foram incluídas 29 mulheres com idades entre 20 e 45 anos. Catorze voluntárias foram alocadas no grupo de obesas e 15, no grupo de eutróficas. Foram realizadas medidas antropométricas e de composição corporal. Resultados: Em ambos os testes, as obesas apresentaram maiores valores de consumo absoluto de oxigênio, ventilação-minuto e pressão arterial sistólica e diastólica; ainda apresentaram menor velocidade de caminhada, distância percorrida e consumo de oxigênio relativo, quando comparadas com as eutróficas. Durante o teste máximo de exercício, a dispneia percebida foi maior e o quociente respiratório menor nas obesas em relação às eutróficas. Durante o teste submáximo, produção de dióxido de carbono, volume corrente e frequência cardíaca foram maiores nas obesas, comparadas às eutróficas. Houve forte correlação entre a frequência cardíaca e moderada correlação entre o consumo de oxigênio no pico dos testes. A frequência cardíaca obtida no teste submáximo aplicado foi capaz de predizer a frequência cardíaca obtida no teste máximo. IntroductionObesity-induced limitations of the cardiopulmonary and metabolic systems, commonly resulting in exertional dyspnea, collectively contribute to th...

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“…Moreover, BIA does not have weight restriction limiting its use with all extreme obese population. Several studies have compared predictions of body composition by BIA with measurements made by reference methods [4,5], but the results are contradictory, likely due to the confounding effects of multiple variables related to the clinical setting, such as range of body mass index (BMI) values and age, sex, and different diseases in the various series [4][5][6][7][8]. In particular, both over-and underestimation of percentage of FM (%FM) have been reported, whereas other studies showed good agreement between BIA and DXA.…”

Section: Introductionmentioning

confidence: 99%

Validity of Bioelectrical Impedance Analysis to Estimate Body Composition Changes After Bariatric Surgery in Premenopausal Morbidly Women

et al. 2009

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In obese patients, subtle variations of the hydration of soft tissues can propagate errors in bioelectrical impedance analysis (BIA) measures of body composition. Bioelectrical impedance vector analysis (BIVA) is a useful method to evaluate tissue hydration. Laparoscopic adjustable gastric banding (LAGB) is a purely restrictive bariatric surgical procedure resulting in lower fat-free mass (FFM) loss than other malabsorptive or mixed intervention. The aim of this study was to evaluate the 6- and 12-month changes in body composition in a homogeneous group of premenopausal morbidly obese women treated by LAGB by comparing the results of conventional BIA and BIVA with dual-energy X-ray absorptiometry (DXA) method. Forty-five consecutive morbidly obese patients (mean age, 35.3 +/- 9.1 years; body mass index, 34.5-48.7 kg/m(2)) were prospectively evaluated at the Endocrinology Unit of the Department of Molecular and Clinical Endocrinology and Oncology. The LAGB device (Lap-Band System; Inamed Health, Santa Barbara, CA, USA) was inserted laparoscopically. Soft tissue hydration was evaluated by BIVA; fat mass (FM) and FFM were evaluated by BIA (BIA 101 RJL, Akern Bioresearch, Firenze, Italy) and by DXA (Hologic QDR 4500A S/N 45622; Hologic Inc., Bedford, MA, USA). Pre- and postoperative BIVA vectors indicated a normal hydration in all patients. Postoperatively, the excess of body weight loss was mainly due to a decrease in FM. The regression analysis of BIA and DXA methods at baseline and at the 6- and 12-month follow-up for FM r (2) values were 0.98, 0.94, and 0.99, respectively (p < 0.001); FM% r (2) values were 0.91, 0.89, and 0.98, respectively (p < 0.001); and FFM r (2) values were 0.87, 0.82, 0.99, respectively (p < 0.001). BIA and DXA measurements of body composition exhibit a high relative agreement in the study group of normo-hydrated obese subjects. BIA tends to overestimate FFM, but this effect is reduced along with the weight loss during the follow-up. Under the stable hydration, the BIA method may be useful as an alternative to DXA in a selected clinical setting when repeated comparisons of body composition are required.

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Usefulness of different techniques for measuring body composition changes during weight loss in overweight and obese women

Cited by 60 publications

References 35 publications

Estimating body fat in NCAA Division I female athletes: a five-compartment model validation of laboratory methods

Estimating body fat in NCAA Division I female athletes: a five-compartment model validation of laboratory methods

Metabolic and clinical comparative analysis of treadmill six-minute walking test and cardiopulmonary exercise testing in obese and eutrophic women

Validity of Bioelectrical Impedance Analysis to Estimate Body Composition Changes After Bariatric Surgery in Premenopausal Morbidly Women

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