Published on in Vol 9, No 1 (2021): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18320, first published
.
![Validity of Wrist-Wearable Activity Devices for Estimating Physical Activity in Adolescents: Comparative Study Validity of Wrist-Wearable Activity Devices for Estimating Physical Activity in Adolescents: Comparative Study](https://asset.jmir.pub/assets/e59180019d59214e43d773fb173e21b7.png 480w,https://asset.jmir.pub/assets/e59180019d59214e43d773fb173e21b7.png 960w,https://asset.jmir.pub/assets/e59180019d59214e43d773fb173e21b7.png 1920w,https://asset.jmir.pub/assets/e59180019d59214e43d773fb173e21b7.png 2500w)
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