Exercise-Induced Breathlessness

Exercise-Induced Breathlessness

Exercise-induced breathlessness is a symptom many parents observe: the child pants, coughs or wheezes when running or playing. It is often justified — especially after very intense exercise — but when breathlessness occurs easily, early during exercise, or is accompanied by cough / wheezing / constrictive chest pain, evaluation is needed.

Key difference: normal fatigue vs pathological breathlessness

Remember that after intense play it is normal for a child to be out of breath. We become concerned when:

• breathlessness starts before the child has "warmed up"
• the child needs many minutes to recover
• there is wheezing, cough or chest pain
• the child avoids exercise out of fear.

Causes:

The most common causes associated with exercise-induced breathlessness:

• exercise-induced bronchoconstriction (exercise-triggered asthma)
• vocal cord dysfunction, often presenting with inspiratory breathlessness and without changes on spirometry
• poor physical fitness / fatigue, especially in sedentary children
• nasal congestion / allergic rhinitis affecting nasal breathing
• More rarely: cardiac problems, anaemia, anatomical airway problems, chronic lung disease.

Symptoms:

Symptoms that need attention:

• marked breathlessness with minimal effort
• cough during or after exercise
• wheezing or a feeling of chest tightness
• fatigue, dizziness or fainting tendency (rare, requires immediate evaluation)
• avoidance of activities / reduced tolerance compared to peers.

Diagnosis:

Diagnosis includes:

• detailed history (e.g. when, how often, duration, what triggers it)
• clinical examination and lung auscultation
• spirometry and/or bronchodilator challenge in older children
• exercise test if required
• exercise laryngoscopy when vocal cord dysfunction is suspected
• allergy testing if indicated
• cardiac evaluation if indicated
• chest X-ray if deemed appropriate
• more specialised laboratory and imaging investigations if deemed necessary
• a normal cardiac evaluation is essential.

Goal: to distinguish asthma from other causes and design targeted treatment.

Treatment:

Treatment depends on the underlying cause:

• if asthma is present: an inhaled bronchodilator (Aerolin) 10–15 minutes before exercise often helps, but only after medical assessment, on a background of preventive inhaled corticosteroid treatment appropriate for the child's age
• if allergic rhinitis is present, managing it improves breathing
• education on correct inhaler/device technique (spacer, mask) where needed
• warm-up: a gradual increase in intensity reduces symptoms and improves fitness with an adapted programme, following paediatric pulmonology assessment and exclusion of aggravating factors.

When to see a paediatric pulmonologist:

Seek immediate medical help if there is:

• severe difficulty breathing
• cyanosis of the lips and face
• marked fatigue or fainting
• haemoptysis

Indications for specialist evaluation by a paediatric pulmonologist if:

• episodes recur frequently in one season
• the child repeatedly needs medication or hospitalisations
• breathlessness affects the child's sporting activity and causes fear in the family.

Specialist evaluation can reveal underlying aggravating factors and propose a follow-up programme.