Published on in Vol 8, No 6 (2020): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/14116, first published
.
![Continuous Measurement of Reconnaissance Marines in Training With Custom Smartphone App and Watch: Observational Cohort Study Continuous Measurement of Reconnaissance Marines in Training With Custom Smartphone App and Watch: Observational Cohort Study](https://asset.jmir.pub/assets/5b6b645e2d44d4d92b9cb3704c3d48d8.png 480w,https://asset.jmir.pub/assets/5b6b645e2d44d4d92b9cb3704c3d48d8.png 960w,https://asset.jmir.pub/assets/5b6b645e2d44d4d92b9cb3704c3d48d8.png 1920w,https://asset.jmir.pub/assets/5b6b645e2d44d4d92b9cb3704c3d48d8.png 2500w)
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