Prospective changes in physical activity, sedentary time and sleep during the COVID-19 pandemic in a US-based cohort study.

From 2018 to Summer 2020, during the COVID-19 pandemic, US adults have made significant shifts in daily time spent in LPA, MVPA and sedentary. There is an urgent need to promote more physical activity and less sedentary time during this public health crisis to avoid sustaining these patterns long-term.