When exercising, should you breathe through your nose, mouth or a combination of both if you have asthma?

Nose: In general, breathing through your nose humidifies and warms the air you inhale, making it more gentle to your airways.

Nose: The nose warms and humidifies the air we breath. Breathing cold air can trigger bronchospasm/asthma in some patients with asthma, so breathing through the nose is best to avoid the direct introduction of cold air to the lungs.