Layering for working out: how to run in sub-20 degree weather

The typical view of a cold morning run. Photo by Naomi Ko / North by Northwestern

When it hit 30 degrees last month, I finally started running outside again, trading the Willard treadmills for sprinting down Orrington to the Baháʼí Temple. Unfortunately, due to my deference to the RealFeel temperature (24 degrees), my unwillingness to layer up when running (not a good choice) and my incorrect assumption that I would “just warm up” as I ran, I found myself three minutes into my workout seriously...