Can extreme cold damage your lungs? Get answers from an expert who studies the lungs of winter athletes

When arctic blasts cause temperatures to plummet, stepping outside can be dangerous. Frost bite can set in quickly. And if you've ever taken a deep breath in extreme cold, you know that it feels as if your lungs are freezing too. In this Health Fusion episode, Viv Williams talks to a researcher from Canada who studies what intensely cold air could do to athlete's (or anyone's) lungs.