Asthma-COPD overlap (ACO)

Asthma-COPD overlap (ACO) describes people who have features of both asthma and COPD, with breathing symptoms that can vary and sometimes flare. Understanding this overlap helps guide the right, individualised approach to staying active and breathing more comfortably.

Physiotherapy supports management through breathing techniques, airway clearance where needed, and exercise to build fitness and confidence. In this guide we cover the clinical features and physiotherapy considerations for asthma-COPD overlap — practical guidance for clinicians and clear, reassuring explanations so patients understand their condition and the day-to-day strategies that help them manage symptoms and stay well.