Lung function naturally declines with age, but research shows that seniors can meaningfully improve their breathing capacity through specific exercises and cardiovascular activity, even starting at 70 or beyond. The respiratory system loses elasticity over decades, but it remains remarkably adaptable, responding to intentional training much like muscle tissue does.

What Happens to Your Lungs as You Age?

By age 70, your respiratory system has undergone significant physiological changes. The diaphragm, the dome-shaped muscle below your heart and lungs that powers breathing, naturally weakens over time. Simultaneously, your ribcage becomes more rigid as bones thin and cartilage calcifies, preventing your chest from expanding as fully as it once did.

The tiny air sacs in your lungs, called alveoli, also lose their shape and elasticity. This reduces the total surface area available for oxygen to enter your bloodstream and carbon dioxide to leave it, making breathing feel less effortless than in younger years. The good news: this decline is not inevitable or irreversible.

For people with a history of asthma or smoking, these age-related changes are often more pronounced. Chronic inflammation from asthma can lead to permanent narrowing of the airways, while smoking accelerates the destruction of alveolar walls and damages the cilia, the tiny hairs responsible for clearing mucus. However, even in these cases, targeted training can help optimize remaining lung volume.

"When you're caring for older people, about one out of every three patients over 65 will come in saying, 'I'm short of breath,'" said Edward Manning, MD, Ph.D., assistant professor of medicine in the Section of Pulmonary, Critical Care, and Sleep Medicine at Yale.

Edward Manning, MD, Ph.D., Yale School of Medicine

Can You Actually Improve Lung Capacity After 70?

Yes. While the biological clock cannot be stopped, the rate of decline is not fixed. Much like building muscle through exercise, the respiratory system can be strengthened through targeted training. The key is understanding that your lungs have significant reserve capacity, meaning most healthy adults do not notice age-related changes until later in life. By engaging in targeted respiratory exercises and maintaining cardiovascular activity, 70-year-olds can optimize their remaining lung volume and maintain a high level of physical independence.

One major factor affecting lung function in older adults is weight. Nearly 30% of Americans 65 and older are obese due to inactive lifestyles, and obesity is linked with poor lung function. Central obesity, where fats accumulate in the abdominal area, is particularly problematic. Excess fat accumulation around the chest and abdomen restricts the lungs' ability to expand during respiration, leading to shallow breathing patterns and shortness of breath.

How to Strengthen Your Lungs: Practical Techniques

• Diaphragmatic Breathing: This deliberate exercise engages the diaphragm to increase lung capacity, a benefit often missed during unconscious, shallow breathing. Lie on your back with your knees bent, place one hand on your chest and the other on your belly, inhale through your nose so your stomach inflates (causing your hand to rise), then exhale through pursed lips. This technique is particularly beneficial for those managing chronic obstructive pulmonary disease (COPD) to help reduce symptoms.
• Pursed-Lip Breathing: Find a comfortable seated or lying position and relax your shoulders and neck. Keep your mouth closed and inhale through your nose for two seconds. Then purse your lips as if you were about to whistle or blow out a candle, and breathe out slowly. The key is exhaling for twice as long as you inhale; if you breathe in for two seconds, aim for a four-second exhalation. This method helps the lungs release "stale" air, keeps the airways open longer, and is especially effective for individuals with asthma, COPD, or pulmonary fibrosis.
• Aerobic Exercise: Activities like jogging or walking are primary drivers for increasing lung capacity and improving overall well-being. During aerobic exercise, the heart and lungs work in tandem to supply the body with increased oxygen. As the heart pumps more blood to support active muscles, breathing becomes faster and deeper to facilitate higher oxygen absorption. This process naturally engages the diaphragm, and because the diaphragm is a muscle, it responds to training. Engaging in cardiovascular activities strengthens the heart-lung-diaphragm connection, ultimately leading to improved lung volume and more efficient breathing.

Why Weight Management Matters for Respiratory Health

Modifying your lifestyle is the most effective way to maintain a healthy weight and improve lung capacity. Exercising and eating a proper diet can shed unwanted pounds and directly enhance respiratory function. The connection is straightforward: excess weight physically restricts lung expansion, while weight loss removes that mechanical barrier and allows your lungs to work more efficiently.

When Should You See a Doctor About Your Lungs?

Regular checkups are essential for early detection of serious respiratory conditions, particularly for those at higher risk. Federal guidelines recommend annual lung cancer screenings for individuals between ages 50 and 80 who have a significant history of smoking. Identifying anomalies in their early stages is critical to improving outcomes, avoiding complications, and reducing the need for more invasive, expensive treatments.

If you experience persistent shortness of breath or chronic coughing, consult a primary care physician or a pulmonologist for a comprehensive evaluation. A lung function test, called spirometry, can measure how much air your lungs hold and how efficiently they work. This baseline measurement is valuable for tracking changes over time and determining whether your breathing exercises and lifestyle modifications are working.

The bottom line: your respiratory system is built to adapt and improve, even at 70. By combining targeted breathing exercises, regular aerobic activity, and weight management, you can reclaim your stamina and ensure your lungs remain a strong foundation for your health at any age.