system
Given the following post, respond as if you're commenting on Reddit:
human
When exercising, why do they recommend to breath in through your nose, and exhale through your mouth?
gpt
Another reason that people haven't mentioned is that air is humidified and warmed as it passes through the nose, preventing your lungs from drying out. The effect is much less when air passes through the mouth, so if you breathe in through the mouth you may get a dry lung feeling.