When do you feel cold?

When I was much younger I seemed to handle the cold much better than the older person I have become. I loved to ski and the temperature was never a problem, except when it was too warm and melted the snow. I can recall even running in the dark on cold January mornings when I was training for the Pittsburgh Marathon. Last week when we had a visit from the Polar Vortex that dropped temperatures into the teens and 20s I barely went...