Nasal vs mouth breathing: Which one actually works better during intense exercise?

Nasal breathing helps filter dust and allergens, thanks to tiny hair-like structures in the nose.
BMJ

Exercise-induced laryngeal obstruction (EILO) in athletes: a narrative review by a subgroup of the IOC Consensus on ‘acute respiratory illness in the athlete’

Exercise-induced laryngeal obstruction (EILO) is caused by paradoxical inspiratory adduction of laryngeal structures during exercise. EILO is an important cause of upper airway dysfunction in young ...