. 2021 Sep 16;5(9):e30819. doi: 10.2196/30819
©Kan Yamagami, Akihiro Nomura, Mitsuhiro Kometani, Masaya Shimojima, Kenji Sakata, Soichiro Usui, Kenji Furukawa, Masayuki Takamura, Masaki Okajima, Kazuyoshi Watanabe, Takashi Yoneda. Originally published in JMIR Formative Research (https://formative.jmir.org), 16.09.2021.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Formative Research, is properly cited. The complete bibliographic information, a link to the original publication on https://formative.jmir.org, as well as this copyright and license information must be included.
Figure 1.
Representative graphs of low (negative) and high (positive) estimated oxygen variation (EOV) signals from the Fitbit Charge 3.