Exercise-Induced Asthma in Children: Coughing After Running and Physical Activity

Why exercise triggers airway symptoms

During vigorous exercise, the body breathes faster and larger volumes of air — often through the mouth, bypassing the nose's warming and humidifying function. The cooler, drier air that reaches the lower airways triggers osmotic and thermal changes in the airway lining, causing mast cells to release inflammatory chemicals that make the bronchial muscles tighten 1Ref 1Grandinetti R, Mussi N, Rossi A, et al. (2024).Exercise-Induced Bronchoconstriction in Children: State of the Art from Diagnosis to Treatment.Pathophysiology of EIB in children, diagnostic spirometry criteria (FEV1 ≥10% fall), management with pre-exercise SABA, warm-up, and environmental strategies. This narrowing typically develops during or a few minutes after peak exercise, peaks about ten to fifteen minutes after stopping, then gradually resolves over thirty to sixty minutes. Cold, dry air (as in winter outdoor sports or ice rinks) is particularly provocative. High-pollen or polluted air also lowers the threshold for EIB.

What it looks like in children

Children with exercise-induced airway symptoms may describe a feeling of chest tightness, shortness of breath out of proportion to their effort, or a cough that comes on during the game or right after the run and persists for a while. Younger children who cannot articulate chest tightness may simply slow down, drop out of games, or develop a persistent cough after recess that goes unreported 1Ref 1Grandinetti R, Mussi N, Rossi A, et al. (2024).Exercise-Induced Bronchoconstriction in Children: State of the Art from Diagnosis to Treatment.Pathophysiology of EIB in children, diagnostic spirometry criteria (FEV1 ≥10% fall), management with pre-exercise SABA, warm-up, and environmental strategies. Parents and coaches sometimes attribute these symptoms to being "out of shape" rather than a treatable airway condition. Wheeze is not always present — a chronic exercise-related cough is enough to warrant evaluation.

Diagnosis

Diagnosis of EIB is typically based on a careful history. For children old enough to cooperate (generally six and older), spirometry can be performed before and after a standardized exercise challenge or bronchodilator use to confirm the pattern. EIB is diagnosed when FEV1 (forced expiratory volume in one second) falls at least 10% compared with the pre-exercise baseline 1Ref 1Grandinetti R, Mussi N, Rossi A, et al. (2024).Exercise-Induced Bronchoconstriction in Children: State of the Art from Diagnosis to Treatment.Pathophysiology of EIB in children, diagnostic spirometry criteria (FEV1 ≥10% fall), management with pre-exercise SABA, warm-up, and environmental strategies. A positive bronchodilator response strongly supports the diagnosis. When symptoms are classic and the history is clear, many providers treat empirically and confirm by the child's response to treatment. Alternative diagnoses such as exercise-induced laryngeal obstruction (EILO), cardiac disease, or physical deconditioning should also be considered 2Ref 2Multiple authors (Delphi expert panel) (2024).Exercise-Induced Bronchoconstriction in Children: Delphi Study and Consensus Document.Consensus recommendations on alternative diagnoses to exclude (EILO, cardiac disease), stepped pharmacological management, and the importance of maintaining physical activity in children with EIB.

Management: before, during, and after activity

The standard management approach for EIB in children includes 1Ref 1Grandinetti R, Mussi N, Rossi A, et al. (2024).Exercise-Induced Bronchoconstriction in Children: State of the Art from Diagnosis to Treatment.Pathophysiology of EIB in children, diagnostic spirometry criteria (FEV1 ≥10% fall), management with pre-exercise SABA, warm-up, and environmental strategies2Ref 2Multiple authors (Delphi expert panel) (2024).Exercise-Induced Bronchoconstriction in Children: Delphi Study and Consensus Document.Consensus recommendations on alternative diagnoses to exclude (EILO, cardiac disease), stepped pharmacological management, and the importance of maintaining physical activity in children with EIB:

• Pre-exercise short-acting bronchodilator (SABA): a rescue inhaler (albuterol) taken fifteen to twenty minutes before sustained exercise can prevent bronchoconstriction for several hours. The child's provider prescribes this and specifies the dose.
• Warm-up: a graduated ten-to-fifteen minute warm-up before peak exercise helps reduce the severity of EIB in many children through a physiological refractory period.
• Cool-down: a gradual cool-down after exercise, rather than stopping abruptly, helps ease the return to resting airway tone.
• Mask or scarf in cold air: in children with cold-air sensitivity, a lightweight neck gaiter or balaclava that covers the nose and mouth during outdoor winter exercise warms and humidifies incoming air.
• Daily controller medicine: if a child needs pre-exercise rescue medicine more than two or three times a week, this suggests that the underlying airway inflammation is insufficiently controlled; a daily inhaled corticosteroid or leukotriene receptor antagonist review is warranted.

Staying active is the goal

Well-managed EIB is not a reason to avoid sports. Physical fitness is beneficial for overall health and lung function, and children who remain active often have better overall asthma control 2Ref 2Multiple authors (Delphi expert panel) (2024).Exercise-Induced Bronchoconstriction in Children: Delphi Study and Consensus Document.Consensus recommendations on alternative diagnoses to exclude (EILO, cardiac disease), stepped pharmacological management, and the importance of maintaining physical activity in children with EIB. Many competitive athletes at elite levels manage EIB with a pre-exercise bronchodilator and appropriate warm-up. Schools and coaches should be informed of the child's diagnosis and management plan so they can support the child appropriately — recognizing symptoms, allowing inhaler use before practice, and understanding that sitting out should not be the default response to exercise cough.