Published on in Vol 8, No 5 (2020): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16674, first published
.
![Low-Cost Consumer-Based Trackers to Measure Physical Activity and Sleep Duration Among Adults in Free-Living Conditions: Validation Study Low-Cost Consumer-Based Trackers to Measure Physical Activity and Sleep Duration Among Adults in Free-Living Conditions: Validation Study](https://asset.jmir.pub/assets/d83676a48334ce4c1e2f4dd496adbdfe.png 480w,https://asset.jmir.pub/assets/d83676a48334ce4c1e2f4dd496adbdfe.png 960w,https://asset.jmir.pub/assets/d83676a48334ce4c1e2f4dd496adbdfe.png 1920w,https://asset.jmir.pub/assets/d83676a48334ce4c1e2f4dd496adbdfe.png 2500w)
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