What causes asthma in swimmers?

The narrowing of the airway and mucus accumulation are fundamental physiological responses that can occur during asthma attacks, especially in swimmers. When exposed to certain triggers, such as allergens or irritants in the environment of a swimming pool (including pool chemicals like chlorine), the airways may become inflamed and constricted. This constriction results in reduced airflow and can lead to difficulty in breathing, which is characteristic of asthma.

In the context of swimming, chlorine and other chemical irritants from the pool can exacerbate these conditions, leading to increased mucus production as a defense mechanism against these irritants. The physiological response includes bronchoconstriction and increased mucus secretion, both of which are key components in the manifestation of asthma symptoms.

Understanding that asthma is fundamentally associated with the narrowing of airways and mucus accumulation highlights the importance of managing environmental factors in swimming facilities to provide a safer experience for those who are asthmatic.