Aquatic Therapy for COPD

Pulmonary rehabilitation is an essential part of managing Chronic Obstructive Pulmonary Disease (COPD). A 2026 systematic review and meta-analysis demonstrates that aquatic therapy for COPD provides significant clinical benefits compared with comparable land-based exercise programmes.

After analysing fourteen randomized controlled trials, researchers concluded that exercising in water improves lung function, walking capacity and respiratory muscle strength while providing a comfortable, low-impact rehabilitation environment.

Why aquatic therapy benefits people with COPD

People with COPD often experience reduced lung function, shortness of breath, muscle weakness and limited exercise tolerance. These limitations can make conventional land-based rehabilitation challenging.

Aquatic therapy creates a supportive environment where patients can exercise more comfortably. The buoyancy of water reduces the physical load on the body, while hydrostatic pressure and water resistance naturally increase the workload of the respiratory muscles.

This combination allows patients to train safely while improving both cardiovascular fitness and breathing efficiency.

Key findings of the study

The systematic review compared water-based exercise with equivalent land-based rehabilitation programmes.

Researchers found that aquatic therapy resulted in significant improvements in several clinically important outcomes.

Improved lung function

Patients participating in aquatic therapy demonstrated greater improvements in:

• FEV1 (% predicted)
• FEV1/FVC ratio

These measurements indicate better pulmonary function and reduced airflow limitation.

Increased exercise capacity

Aquatic therapy significantly improved functional exercise performance.

Participants increased their Six-Minute Walk Distance (6MWD) by an average of almost 48 metres, indicating better endurance and improved ability to perform everyday activities.

The largest improvements were observed during rehabilitation programmes lasting eight weeks or less.

Stronger respiratory muscles

The review also demonstrated significant improvements in both:

• Maximal Inspiratory Pressure (MIP)
• Maximal Expiratory Pressure (MEP)

These findings indicate stronger respiratory muscles, allowing patients to breathe more efficiently during both exercise and daily activities.

Why water-based exercise works

The therapeutic properties of water provide several physiological advantages for pulmonary rehabilitation.

Buoyancy reduces physical strain

Water supports body weight, reducing stress on joints and muscles. This enables patients with limited exercise tolerance to move more comfortably.

Hydrostatic pressure trains the respiratory muscles

Water pressure gently compresses the chest wall, increasing the workload of the inspiratory and expiratory muscles. This creates a natural form of respiratory muscle training during exercise.

Water resistance improves strength and endurance

Unlike traditional resistance equipment, water provides continuous resistance throughout every movement. This allows patients to improve muscular endurance while maintaining a low-impact exercise environment.

Clinical implications

This systematic review provides strong evidence that aquatic therapy for COPD is an effective addition to conventional pulmonary rehabilitation.

Hydrotherapy may be particularly valuable for patients who struggle with land-based exercise because of:

• Reduced exercise tolerance
• Lower limb weakness
• Joint pain
• Obesity
• Balance limitations
• Severe dyspnoea

For these patients, aquatic therapy can improve participation while achieving clinically meaningful rehabilitation outcomes.

Outcome measures used in the review

The researchers evaluated the effectiveness of aquatic therapy using internationally recognised clinical outcome measures, including:

• Forced Expiratory Volume in one second (FEV1)
• FEV1/FVC ratio
• Six-Minute Walk Distance (6MWD)
• Maximal Inspiratory Pressure (MIP)
• Maximal Expiratory Pressure (MEP)

These outcome measures are commonly used in pulmonary rehabilitation to assess improvements in lung function, exercise capacity and respiratory muscle performance.

Conclusion

This 2026 systematic review confirms that aquatic therapy for COPD provides consistent clinical benefits compared with land-based exercise.

Patients achieved significant improvements in lung function, respiratory muscle strength and walking capacity while exercising in a safe and supportive aquatic environment.

The authors conclude that water-based exercise should be considered a valuable component of comprehensive pulmonary rehabilitation programmes for people living with COPD.