Don’t let this common issue derail your outdoor training.
in New York. “And that drying effect on the mucosa breaks down the barrier of protection for the cells that line the respiratory tract, which triggers a pain response in the nerves that alerts you to prevent further damage.”
Inside your nasal passages are tiny blood vessels that warm the nose and small cells called cilia, which trap airborne particles such as dust and fumes. Breathing through your mouth prevents the cold air from being warmed up, which dries out through tissue, explains Ferrer. Also, your throat isn’t designed for trapping pollutants that can cause all kinds of illnesses.
Your respiratory system requires humidity around 40 percent for proper functioning and protection, says Rao—but that’s not to say you shouldn’t be running if conditions are drier than that.
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