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J Am Diet Assoc. 2003 May;103(5):588-92.

A new handheld device for measuring resting metabolic rate and oxygen consumption.

Author information

1
Human Performance Laboratory, Department of Health and Exercise Science, Appalachian State University, Boone, NC 28608, USA. niemandc@appstate.edu

Abstract

OBJECTIVE:

The purpose of this study was to test a new handheld device, the BodyGem (HealtheTech Inc., Golden, CO), that measures resting metabolic rate (RMR).

SUBJECTS/DESIGN:

Sixty-three adults (43 women, 20 men) (mean+/-SD, age 41.3+/-11.2 years and body mass index, 26.5+/-6.6 kg/m(2)) were tested during two separate sessions within a 2-week period, and, in each session, two BodyGem and two Douglas bag RMR measurements were made in a random and counterbalanced order.

MAIN OUTCOME MEASURES:

Resting oxygen consumption and energy expenditure.

STATISTICAL ANALYSES PERFORMED:

A 2 (methods) x 4 (time points) repeated measures ANOVA, Pearson product-moment coefficients, Bland-Altman plots.

RESULTS:

Within session reliability for measurement of O(2), consumption was high on both days for the BodyGem (r=0.97). During the 4 single tests, BodyGem and Douglas bag O(2) consumption values were significantly correlated (r=0.81-0.87), with SEEs ranging from 22 to 28 mL. min(-1). Mean O(2) consumption and RMR values for all 4 tests were 241+/-46 and 240+/-45 mL x min(-1) (r=0.91, SEE 18.7 mL x min(-1)) and 1,657+/-324 and 1,650+/-307 kcals x day(-1) (r=0.91, SEE 134 kcals x day(-1)) for the BodyGem and Douglas bag methods, respectively.

APPLICATIONS/CONCLUSIONS:

These data indicate that the BodyGem is an accurate and reliable device for measuring oxygen consumption and calculating RMR during repeated tests within a day, single tests on separate days, or when measurements are averaged.

PMID:
12728217
DOI:
10.1053/jada.2003.50116
[Indexed for MEDLINE]
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