Published on in Vol 8, No 9 (2020): September
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18694, first published
.
![Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review](https://asset.jmir.pub/assets/d9783731e63596a3db53c3d864cb2a24.png 480w,https://asset.jmir.pub/assets/d9783731e63596a3db53c3d864cb2a24.png 960w,https://asset.jmir.pub/assets/d9783731e63596a3db53c3d864cb2a24.png 1920w,https://asset.jmir.pub/assets/d9783731e63596a3db53c3d864cb2a24.png 2500w)
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