Published on in Vol 21, No 6 (2019): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12394, first published
.
![Monitoring Physical Activity Levels Using Twitter Data: Infodemiology Study Monitoring Physical Activity Levels Using Twitter Data: Infodemiology Study](https://asset.jmir.pub/assets/ec52a0a9f98ef3639e85ceda2f458071.png 480w,https://asset.jmir.pub/assets/ec52a0a9f98ef3639e85ceda2f458071.png 960w,https://asset.jmir.pub/assets/ec52a0a9f98ef3639e85ceda2f458071.png 1920w,https://asset.jmir.pub/assets/ec52a0a9f98ef3639e85ceda2f458071.png 2500w)
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