Published on in Vol 23, No 2 (2021): February
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/23701, first published
.
![Physical Activity Behavior Before, During, and After COVID-19 Restrictions: Longitudinal Smartphone-Tracking Study of Adults in the United Kingdom Physical Activity Behavior Before, During, and After COVID-19 Restrictions: Longitudinal Smartphone-Tracking Study of Adults in the United Kingdom](https://asset.jmir.pub/assets/52516e14fcef27d48e9163b51f7c5fab.png 480w,https://asset.jmir.pub/assets/52516e14fcef27d48e9163b51f7c5fab.png 960w,https://asset.jmir.pub/assets/52516e14fcef27d48e9163b51f7c5fab.png 1920w,https://asset.jmir.pub/assets/52516e14fcef27d48e9163b51f7c5fab.png 2500w)
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