This is a an excellent, very valuable article by Dr. Kenneth P. Moritsugu, formerly Deputy Surgeon General and the Acting Surgeon General of the United States.

https://capitolweekly.net/exercise-crucial-amid-the-stresses-of-covid-19/?fbclid=IwAR3p33MLXvYy-56iINv2BcylVh82If09Wesj8jW-v4PziNIg9J0FS56ixbs