Decreased physical activity among youth resulting from COVID-19 pandemic—related school closures: natural experimental study
Grimes, Amanda, Joseph S Lightner, Katlyn Eighmy, Chelsea Steel, Robin P Shook, and Jordan Carlson. 2022. “Decreased Physical Activity Among Youth Resulting from COVID-19 Pandemic—related School Closures: Natural Experimental Study”. JMIR Formative Research 6 (4): e35854.