Should you run with mouth open?

Running with your mouth open can help you take in more air, especially during intense exercise when your body needs additional oxygen. However, it may also lead to dry mouth and increased inhalation of dust or allergens. Ideally, you should breathe through your nose when possible, but if you find it difficult to get enough oxygen, breathing through your mouth is acceptable. Just be mindful of your surroundings and maintain good hydration.