Asthma and exercise

Fast breathing during activity moves more air through the airways. Cool or dry air can make sensitive airways narrow, leading to cough, wheeze, chest tightness, or unusual breathlessness during exercise or shortly afterward. Symptoms that repeatedly limit activity may indicate that day-to-day asthma control or inhaler technique needs reassessment.

Exercise-related symptoms are not a reason to abandon movement. The pattern, setting, weather, and intensity can help a clinician distinguish an asthma flare from low fitness, an infection, or another cause of breathlessness.

Follow your written asthma plan and use preventive or reliever medicine exactly as prescribed. Keep the reliever inhaler within reach, check that it is not empty, and use a spacer if one is part of your plan. Begin gently, build intensity gradually, and cool down rather than stopping abruptly.

Pause if coughing, wheezing, tightness, or breathlessness develops. Move away from smoke, dust, heavy traffic pollution, or strongly scented products. On cool, dry days, covering the nose and mouth can warm inhaled air. Record recurring symptoms and what helped so your clinician can adjust management.

Stop exercising and follow your asthma action plan if symptoms start. Seek emergency help for severe difficulty breathing, inability to speak comfortably, blue or grey lips, confusion, fainting, marked chest pulling with each breath, or symptoms that keep worsening despite prescribed reliever medicine. Do not continue the activity or drive yourself when breathing is severely impaired.

Arrange a routine review if exercise frequently causes symptoms, wakes you later, makes you avoid normal activities, or requires reliever medicine more often than your personal plan allows.

Ask whether your current control is suitable for your chosen activity, when your prescribed inhaler should be used, and how to recognise a flare. Bring your inhalers so technique and the remaining doses can be checked. Discuss symptoms that occur only in a particular climate, venue, or season, and request a written plan that coaches or exercise partners can understand.