Wearable Activity Tracker Data SQLite database of wearable activity tracker users (N=88) data collected for 4 months. The data has been collected between May 15th 2020 and September 15th 2020 in Switzerland, and is part of the data originally used in this study. The data was collected with a Fibit Inspire HR. Age of participants: min. age: 18 y.o., max age: 31 y.o., mean age: 21.1 y.o., std age: 2.2 y.o. Gender of participants: women: 67%, men: 33% For each of the 88 users, we collected: step count for every minute heart rate for every minute resting heart rate sleep data fall asleep time duration sleep quality restless times restless duration all automatically detected activities type (e.g., walking, swimming) duration time gender (as declared in the Fitbit profile)