COVID-19-related mobility reduction: heterogenous effects on sleep and physical activity rhythms

Singapore was one of the few countries where a large group of adults had objectively tracked sleep habits before, during and after COVID-19. In this study, working adults kept their pre-COVID-19 sleep routines even after the announcement of the global pandemic. These routines were demonstrably altered by New Year and Lunar New Year celebrations / festivities but what was to be the most severe pandemic the world has encountered did not shift routines until citizens underwent movement restrictions. This illustrates how difficult it can be to shift sleep habits without structural measures.