Changes in Physical Activity, Heart Rate, and Sleep Measured by Activity Trackers During the COVID-19 Pandemic Across 34 Countries: Retrospective Analysis

Bastien Wyatt   ^{1, 2} , MSci ;   Nicolas Forstmann   ^{1, 2} , MCS ;   Nolwenn Badier   ^{1, 2} , MCS ;   Anne-Sophie Hamy   ³ , MD, PhD ;   Quentin De Larochelambert   ^{1, 2} , PhD ;   Juliana Antero   ^{1, 2} , PhD ;   Arthur Danino   ³ , MSc ;   Vincent Vercamer   ⁴ , PhD ;   Paul De Villele   ⁴ , PharmD, PhD ;   Benjamin Vittrant   ⁴ , PhD ;   Thomas Lanz   ⁵ , MD ;   Fabien Reyal   ^{3, 6} , MD, PhD ;   Jean-François Toussaint   ^{1, 2, 7} , MD, PhD ;   Lidia Delrieu   ^{1, 2, 3} , PhD

¹ Institute for Research in bioMedicine and Epidemiology of Sport, Université Paris Cité, Paris, France

² INSEP (Institut National du Sport, de l'Expertise et de la Performance), Paris, France

³ Residual Tumor and Response to Treatment Laboratory, Translational Research Department, INSERM, U932 Immunity and Cancer, Institut Curie, Université Paris Cité, Paris, France

⁴ Withings, Issy-les-Moulineaux, France

⁵ Department of Anesthesiology, Clinique de la Sauvegarde, Lyon, France

⁶ Department of Surgical Oncology, Institut Curie, Université Paris Cité, Paris, France

⁷ CIMS (Center for Investigations in Medicine and Sports), Hôtel-Dieu, Assistance Publique – Hôpitaux de Paris, Paris, France