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Research Letter |

Accuracy of Wearable Devices for Estimating Total Energy Expenditure Comparison With Metabolic Chamber and Doubly Labeled Water Method

Haruka Murakami, PhD1; Ryoko Kawakami, PhD2; Satoshi Nakae, MSc1; Yoshio Nakata, PhD3; Kazuko Ishikawa-Takata, PhD1; Shigeho Tanaka, PhD1; Motohiko Miyachi, PhD1
[+] Author Affiliations
1Department of Health Promotion and Exercise, National Institute of Health and Nutrition, NIBIOHN, Tokyo, Japan
2Faculty of Sport Sciences, Waseda University, Saitama, Japan
3Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
JAMA Intern Med. 2016;176(5):702-703. doi:10.1001/jamainternmed.2016.0152.
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This study examines the accuracy of total energy expenditure estimates made by wearable devices compared with measurements made using the metabolic chamber and doubly labeled water methods.

Accurate estimation of energy expenditure is a key element in determining the relationships between aspects of human behavior, physical activity, and overall health.1,2 Although wearable devices for estimating energy expenditure are becoming increasingly popular, there is little evidence regarding their validity.3,4 This study was performed to examine the validity of total energy expenditure estimates made by several wearable devices compared with gold standard measurements for a standardized day (metabolic chamber method) and free-living days (doubly labeled water [DLW] method).

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Figure 1.
Differences in Total Energy Expenditure in 19 Patients

Spearman rank correlation coefficients were obtained by interparticipant analysis. DLW indicates doubly labelled water; TEE, total energy expenditure.

aSignificant correlation for Spearman test between standard TEE and TEE estimated by each device.

bSignificant difference from TEE obtained by the metabolic chamber or DLW method.

cTEE was calculated by adding resting metabolic ratio to physical activity energy expenditure provided by ActiGraph.

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Figure 2.
All 12 Wearable Devices on the Body

Photo of all 12 wearable devices: Fitbit Flex, JAWBONE UP24, Misfit Shine, EPSON PULSENCE PS-100, Garmin Vivofit (wrist), TANITA AM-160, OMRON CaloriScan HJA-403C (hand-held), and Withings Pulse O2, OMRON Active style Pro HJA-350IT, Panasonic Actimarker EW4800, SUZUKEN Lifecorder EX, and ActiGraph GT3X (waist).

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