The loss of muscle mass is a defining characteristic of malnutrition, and there is ongoing interest in the assessment of lean tissue at the bedside. Globally, bioimpedance techniques have been widely appreciated for their noninvasiveness, safety, ease of use, portability, and relatively low cost compared with other clinically available methods. In this brief update, we review the 3 primary types of commercially available bioimpedance devices (single‐and multiple‐frequency and spectroscopy) and differentiate the underlying theory and current …

Objective: A device of based on the multi frequencies impedance method, named the InBody720, was developed for the purpose of estimating body composition. Methods: The performance, reliability and validity of this system were evaluated in Japanese subjects. Results: The coefficient variation (CV:%) in same-day tests was 1.96 (body fat percentage:%), 0.62 (muscle mass: kg), 0.63 (lean body mass: kg) and 1.09 (bone mineral content: kg), in three separate-day tests it was 3.59 (body fat percentage), 1.07 (muscle …

Abstract Esco, MR, Snarr, RL, Leatherwood, MD, Chamberlain, NA, Redding, ML, Flatt, AA, Moon, JR, and Williford, HN. Comparison of total and segmental body composition using DXA and multifrequency bioimpedance in collegiate female athletes. J Strength Cond Res 29 (4): 918–925, 2015—The purpose of this investigation was to determine the agreement between multifrequency bioelectrical impedance analysis (BIA) and dual-energy x-ray absorptiometry (DXA) for measuring body fat percentage (BF%), fat-free mass (FFM), and …

Background Sarcopenia is a major health issue especially in patients on maintenance hemodialysis. Low skeletal muscle mass is included in the diagnostic criteria for sarcopenia. The skeletal muscle mass is usually evaluated by modalities such as bioimpedance analysis (BIA) or dual-energy X-ray absorptiometry, however the assessment of skeletal muscle mass using computed tomography (CT) images has not been established. The purpose of the study was to investigate the feasibility of the assessment of skeletal muscle mass using CT …

Modern bioelectrical impedance analysis (BIA) provides a wide range of body composition estimates such as fat mass (FM), lean body mass (LBM), and body water, using specific algorithms. Assuming that the fat free mass (FFM) and LBM can be accurately estimated by …

Current bioelectric impedance analysis (BIA) systems are often large, cumbersome devices which require strict electrode placement on the user, thus inhibiting mobile capabilities. In this work, we developed a handheld BIA device that measures impedance from multiple frequencies (5 kHz~ 200 kHz) with four contact electrodes and evaluated the BIA device against standard body composition analysis systems: a dual-energy X-ray absorptiometry (DXA) system (GE Lunar Prodigy, GE Healthcare, Buckinghamshire, UK) and a whole-body …

Background: Obesity is commonly assessed by body mass index (BMI) of which limitations come from an inability to distinguish body fat mass from lean mass. Several anthropometric measurements, including BMI, waist circumference, waist‐to‐height ratio and waist‐to‐hip ratio have been used to predict metabolic syndrome. The purpose of this study was to evaluate the utility of FMI or BF% combined with previous known anthropometric indices to assess the risk of metabolic syndrome in clinical practice. Methods: In 5534 men visiting a …

Background and objectives Measuring body composition is relevant in geriatric medical patients at high risk of sarcopenia (loss of muscle mass/strength) for diagnosis and monitoring efficacy of treatment interventions. Dual‐energy X‐ray absorptiometry (DXA) and bio‐impedance analysis (BIA) are widely used in research/clinical practices, but their agreement is unknown in this population. Therefore, it was investigated how a dual‐frequency (DF)‐BIA compares to DXA regarding replicability, direct comparisons and …

Background Nutrition is closely related to mortality and pulmonary and respiratory muscle function in cystic fibrosis (CF) patients. We initially validated results from a bioelectrical impedance device against dual energy x-ray absorptiometry (DEXA). We then determined whether fat free mass assessed by a portable impedance device rather than body mass index (BMI) better correlated with pulmonary function, respiratory muscle strength and exercise capacity in CF patients. Methods Eighteen young people and adults (median age …

Introduction: There are several laboratory methods for assessing body composition. The purpose of this study was to compare three body composition methods in a cohort of exercise-trained men and women: air displacement plethysmography (Bod Pod®), dual energy x-ray absorptiometry (DXA) and a multi-frequency bioelectrical impedance (MF-BIA) device (InBody® 770). Methods: Subjects (n= 155; 42 male, 113 female) came to the laboratory for body composition assessment (ie, percent body fat, fat-free mass and fat …