An international physical activity and public health research agenda to inform coronavirus disease-2019 policies and practices

Physical activity(PA)has strong relevance for limiting the harms to human health and well-being due to the coronavirus disease-2019(COVID-19)pandemic.1 Active muscles produce chemicals that improve immune functioning,which in turn reduces the extent of infections,and decreases inflammation,and these are the main causes of the lung damage from severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection.PA is a powerful preventive and therapeutic intervention for the most common pre-existing chronic conditions that increase risk of severe COVID-19 infections and mortality.