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Comparison Study Suggests MF-BIA is a Viable Alternative to DXA for Tracking Body Composition Changes in Athletes

By August 22, 2019January 31st, 2022No Comments

CERRITOS, CA., August 16, 2019 — Body composition assessments (i.e., fat mass, fat-free mass, or percent body fat) are an important part of determining the effects of various interventions related to diet, training, and supplementation in both recreational and professional athletes. Coaches want to monitor directional changes in athletes to help enhance athletic performance.

Although all body composition assessments are subject to limitations, Dual energy x-ray absorptiometry (DXA) is often used as a reference method for estimating body composition. However, alternatives to DXA may be required by individuals who need more frequent and portable options for body composition testing. BIA is a viable alternative because it is relatively simple, quick, and noninvasive.

In an investigation recently published in the Journal of Functional Morphology and Kinesiology, researchers at Nova Southeastern University compared different body composition methods for tracking diet-induced changes. Methods used included: a DXA machine (Model: Hologic Horizon W) and an InBody 770 multi-frequency bioelectrical impedance (MF-BIA) device.

A group of exercise-trained men and women were instructed to reduce their energy intake from fats and carbohydrates for a four-week period while maintaining the same exercise regimen. Pre and post assessments for body composition were determined via MF-BIA and DXA.

“The data demonstrate that an MF-BIA device (InBody 770) can predict changes in body composition (i.e., fat mass, fat-free mass, and percent body fat) similar to a DXA.”, writes first author Dr. Jose Antonio.

The findings did indicate that when comparing measures of fat-free and fat mass, MF-BIA tends to provide overestimations of the former and underestimate the latter. Regardless of the differences, “Most athletes and coaches are particularly interested in tracking the change in body composition and not necessarily the absolute values”.

InBody Co. Ltd., the manufacturer of professional BIA devices like the InBody 770 and a pioneer in Direct Segmental Bioelectrical Impedance analysis (DSM-BIA), welcomes close scrutiny from Dr. Antonio and others in the scientific community.

“For measuring body composition in a professional setting, this type of research is increasing the conversation that DSM MF-BIA should have a place alongside methodologies like hydrostatic underwater and DXA,” says Harry Yun, CEO of InBody USA. “Understanding the potential and limitations of all methodologies is important for anyone who measures body composition. Investigations like this give consumers the knowledge to explore the range of body composition options available to find the right fit for their needs.”


This investigation was not funded in any way by InBody Co., Ltd. or any of its affiliates and its results are those of an independent research investigation into bioimpedance analysis. This press release seeks to highlight the work of Dr. Jose Antonio and his colleagues in order to provide information regarding body composition analysis.

About Nova Southeastern University (NSU):

Located in beautiful Fort Lauderdale, Florida, NSU is ranked among U.S. News & World Report’s Top 200 National Research Universities and is a dynamic, private research university providing high-quality educational and research programs at the undergraduate, graduate, and first-professional degree levels. Established in 1964, NSU now includes 16 colleges, the 215,000-square-foot Center for Collaborative Research, a private JK-12 grade school, the Mailman Segal Center for Human Development with specialists in Autism, the world-class NSU Art Museum Fort Lauderdale, and the Alvin Sherman Library, Research and Information Technology Center, which is Florida’s largest public library. NSU has campuses in Fort Lauderdale, Fort Myers, Jacksonville, Miami, Miramar, Orlando, Palm Beach, and Tampa, Florida, as well as San Juan, Puerto Rico, while maintaining a presence online globally. Classified as a research university with “high research activity” by the Carnegie Foundation for the Advancement of Teaching, NSU is one of only 50 universities nationwide to also be awarded Carnegie’s Community Engagement Classification, and is also the largest private institution in the United States that meets the U.S. Department of Education’s criteria as a Hispanic-serving Institution. For more information, please visit

Source: Journal of Functional Morphology and Kinesiology

Comparison of Dual-Energy X-ray Absorptiometry (DXA) Versus a Multi-Frequency Bioelectrical Impedance (InBody 770) Device for Body Composition Assessment after a 4-Week Hypoenergetic Diet

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