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Changes in Physical Activity, Heart Rate, and Sleep Measured by Activity Trackers During the COVID-19 Pandemic Across 34 Countries: Retrospective Analysis.
Wyatt B, Forstmann N, Badier N, Hamy AS, De Larochelambert Q, Antero J, Danino A, Vercamer V, De Villele P, Vittrant B, Lanz T, Reyal F, Toussaint JF, Delrieu L. Wyatt B, et al. Among authors: badier n. J Med Internet Res. 2025 Apr 4;27:e68199. doi: 10.2196/68199. J Med Internet Res. 2025. PMID: 40184182 Free PMC article.