How to Increase Lung Capacity: Breathing Exercises That Work

Does lung capacity actually change with exercise?

Total lung capacity — the absolute volume your lungs can hold — is largely determined by the size of your chest and the elasticity of your lung tissue. In healthy adults, this does not change dramatically with training. What does change with consistent exercise and breathing practice:

• Respiratory muscle strength and endurance — The diaphragm and intercostal muscles become stronger and more efficient.
• Breathing mechanics — You learn to use your full lung volume more efficiently, reducing wasted effort.
• Exercise tolerance — With conditioning, you can do more physical activity at a lower perceived breathing effort.
• Breathlessness management — In conditions like COPD, specific techniques reduce the sense of air hunger during daily activities 1Ref 1Global Initiative for Chronic Obstructive Lung Disease (2024).Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease (2024 Report).Role of pulmonary rehabilitation, diaphragmatic breathing, and pursed-lip breathing in COPD management.

For people with healthy lungs, the primary benefit is fitness and efficiency. For people with lung disease, structured breathing techniques and pulmonary rehabilitation are an integral part of management 1Ref 1Global Initiative for Chronic Obstructive Lung Disease (2024).Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease (2024 Report).Role of pulmonary rehabilitation, diaphragmatic breathing, and pursed-lip breathing in COPD management.

What is diaphragmatic breathing and how do you do it?

The diaphragm is the dome-shaped muscle below the lungs that does most of the work of breathing. Many people, especially those with COPD or chronic anxiety, rely too heavily on neck and shoulder muscles, which are inefficient.

How to practice: 1. Sit comfortably or lie on your back with knees bent. 2. Place one hand on your chest, one on your belly. 3. Breathe in slowly through your nose. Your belly should rise; your chest should stay mostly still. 4. Breathe out slowly through your mouth. Let your belly fall. 5. Practice for 5–10 minutes, two or three times a day.

This technique is endorsed as part of pulmonary rehabilitation for COPD 1Ref 1Global Initiative for Chronic Obstructive Lung Disease (2024).Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease (2024 Report).Role of pulmonary rehabilitation, diaphragmatic breathing, and pursed-lip breathing in COPD management and is commonly taught in asthma management programs 2Ref 2Global Initiative for Asthma (GINA) Science Committee (2024).Global Strategy for Asthma Management and Prevention.Breathing techniques as adjunct management in asthma.

What is pursed-lip breathing?

Pursed-lip breathing is especially helpful for people with COPD because it slows the breathing rate, keeps the airways open slightly longer, and reduces the air trapping that causes breathlessness.

How to do it: 1. Inhale slowly through your nose for 2 counts. 2. Pucker your lips as if you are about to whistle or blow out a candle. 3. Exhale slowly through pursed lips for 4 counts — twice as long as your inhale. 4. Use this technique during activity (climbing stairs, walking), when you feel short of breath, and as a general calming exercise.

Regular practice helps people with COPD carry out everyday activities with less breathlessness 1Ref 1Global Initiative for Chronic Obstructive Lung Disease (2024).Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease (2024 Report).Role of pulmonary rehabilitation, diaphragmatic breathing, and pursed-lip breathing in COPD management.

What other exercises help lung function?

Aerobic exercise Walking, cycling, swimming, and other sustained aerobic activities improve cardiovascular and pulmonary fitness. Current WHO guidelines recommend at least 150–300 minutes of moderate-intensity aerobic activity per week for general health 3Ref 3Bull FC, Al-Ansari SS, Biddle S, et al. (2020).World Health Organization 2020 guidelines on physical activity and sedentary behaviour.Recommended aerobic exercise targets for general cardiopulmonary health. In people with lung disease, even lower starting amounts — supervised or guided by a clinician — are beneficial.

Pulmonary rehabilitation For people with COPD or other significant lung conditions, formal pulmonary rehabilitation programs combine supervised exercise, breathing techniques, education, and nutrition support. The GOLD guidelines for COPD consistently identify pulmonary rehabilitation as one of the highest-value non-pharmacological interventions for improving exercise tolerance and quality of life 1Ref 1Global Initiative for Chronic Obstructive Lung Disease (2024).Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease (2024 Report).Role of pulmonary rehabilitation, diaphragmatic breathing, and pursed-lip breathing in COPD management.

Inspiratory muscle training Devices that provide resistance during inhalation can strengthen the diaphragm and other inspiratory muscles. Evidence supports their use as an adjunct in pulmonary rehabilitation, though they are not standard initial therapy for most people.

Yoga and tai chi These practices incorporate controlled breathing alongside gentle movement. Observational data suggest they can support breathing efficiency and reduce stress-related breathlessness, though the evidence base is smaller than for formal pulmonary rehabilitation.

Should I work with a clinician on breathing exercises?

If you have an existing lung condition such as asthma or COPD, working with your Gale clinician — and potentially a pulmonologist, respiratory therapist, or physical therapist through referral — will give you a structured, safe program tailored to your current lung function. Self-directed breathing exercises are generally safe, but people with active symptoms should have those symptoms evaluated rather than managed only with technique.