Published on in Vol 7, No 4 (2021): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/23806, first published
.
![Consumer-Based Activity Trackers as a Tool for Physical Activity Monitoring in Epidemiological Studies During the COVID-19 Pandemic: Development and Usability Study Consumer-Based Activity Trackers as a Tool for Physical Activity Monitoring in Epidemiological Studies During the COVID-19 Pandemic: Development and Usability Study](https://asset.jmir.pub/assets/2a97e461dc64096ab232e8dd17e058b7.png 480w,https://asset.jmir.pub/assets/2a97e461dc64096ab232e8dd17e058b7.png 960w,https://asset.jmir.pub/assets/2a97e461dc64096ab232e8dd17e058b7.png 1920w,https://asset.jmir.pub/assets/2a97e461dc64096ab232e8dd17e058b7.png 2500w)
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