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5. Wear A Mask
Galen Rupp took a lot of heat from running enthusiasts when he showed up at the 2011 NYC Half Marathon wearing a mask. While many onlookers thought he might be a ninja, or worse yet a bank robber, Rupp was actually protecting himself from allergies and the cold air. The cold, dry winter air can cause bronchial spasms, which restricts air from filling the lungs. Running in a light mask can help warm-up the air before it hits your lungs. You don’t want or need a beefy scarf, but a light mask can help filter the air just enough if you tend to have breathing issues, especially when you try to run hard.