When is it too cold to run…

I have been having some pain from tight muscles… some sciatic pain as a result…. so i have to stretch a lot and ice a lot and get active release to loosen up the muscles so i have less pain… so i have a question…

Is is too cold to run when you don’t have to ice your butt when you get home because it is already frozen during the run???

TOTB: wear more than you think you will need in the winter because you can always take layers off…

BOTB: if you don’t wear enough clothing and realize it is too cold for what you have on, use the newspaper you threw into the back seat for added protection… just make sure to tuck your clothes into your pants so you don’t lose your insulation along the trail…