Picture this.  It’s 37 degrees out, full sun, no wind.  I emerge from my house for a run wearing my full winter ensemble which includes long pants, two long-sleeved shirts, and a multi-layer windbreaker/jacket with the hood zipped tightly around my face over top of my hat.  The finishing touch is a set of mittens that would make it seem to the innocent bystander as if I might be on my way to summit Everest.  The other night, I arrived at running club in weather just like this, slightly warmer than average for the middle of winter in Ohio, especially after dark.  As we stood around waiting to begin (standing…