Accuracy of 12 Wearable Devices for Estimating Physical Activity Energy Expenditure Using a Metabolic Chamber and the Doubly Labeled Water Method: Validation Study

Haruka Murakami   ^{1 *} , PhD ;   Ryoko Kawakami   ^{1, 2 *} , PhD ;   Satoshi Nakae   ^{3, 4} , MSc ;   Yosuke Yamada   ⁵ , PhD ;   Yoshio Nakata   ⁶ , PhD ;   Kazunori Ohkawara   ⁷ , PhD ;   Hiroyuki Sasai   ⁸ , PhD ;   Kazuko Ishikawa-Takata   ³ , PhD ;   Shigeho Tanaka   ³ , PhD ;   Motohiko Miyachi   ¹ , PhD

¹ Department of Physical Activity Research, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan

² Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan

³ Department of Nutrition and Metabolism, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan

⁴ Graduate School of Engineering Science, Osaka University, Osaka, Japan

⁵ Section of Healthy Longevity Research, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan

⁶ Faculty of Health and Sport Sciences, University of Tsukuba, Ibaraki, Japan

⁷ Graduate School of Informatics and Engineering, University of Electro-Communication, Tokyo, Japan

⁸ Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan

*these authors contributed equally