Normally I don't go out running in the cold either, but I dont have any real workout equipment that actually does any good. Normally I pack a bag and head to the gym, but with the covid rampaging around like it owns the joint, I've got no gym to go to. My options are limited.
So far its isnt too bad, my knee hurts more than my ribs do at the moment, unless I laugh or take too deep of a breath. Constantly squatting down so my knee is very sore. No bruising to see, just a small little mark about the size of a dime.