You can exercise your lungs through targeted breathing techniques, rib cage mobility work, and aerobic activity. The good news: unlike most organs, your respiratory muscles respond to training the same way your biceps do. A consistent routine of 5 to 10 minutes twice a day is enough to start building measurable improvements in how deeply and efficiently you breathe.
It helps to understand what “exercising your lungs” actually means. Cardio exercise doesn’t increase the physical size of your lungs. What it does is make your body more efficient at getting oxygen into your bloodstream and delivering it to working muscles. Breathing exercises, on the other hand, directly strengthen the diaphragm and the muscles between your ribs that power each inhale and exhale. The combination of both is what gives you noticeably better breathing capacity over time.
Diaphragmatic Breathing
This is the foundation of every lung exercise routine. Your diaphragm is a dome-shaped muscle sitting below your lungs, and most people drastically underuse it. Shallow, chest-only breathing leaves stale air trapped in the lower portions of your lungs and forces smaller, weaker muscles to do work the diaphragm should handle.
To practice: sit or lie down comfortably and place one hand on your belly. Breathe in slowly through your nose, directing the air downward so your stomach rises under your hand. Imagine inflating a balloon in your abdomen. Hold for a second or two, then exhale fully, letting the balloon deflate completely. Take 10 complete breaths per session.
If this feels awkward or difficult while sitting upright, try it lying down first. Gravity works in your favor in that position, making it easier to feel the belly rise. The U.S. Department of Veterans Affairs recommends practicing for 5 to 10 minutes, twice daily. A useful variation: breathe in for a count of two and out for a count of three, deliberately making the exhale longer than the inhale. That extended exhale helps you empty stale air more completely and trains a slower, more controlled breathing pattern.
Pursed-Lip Breathing
Pursed-lip breathing is one of the simplest ways to control shortness of breath, whether you have a lung condition or you’re just winded from climbing stairs. The technique keeps your airways open longer during exhalation, which clears out trapped air and makes room for fresh oxygen on the next breath.
Inhale through your nose at a normal pace. Then pucker your lips as if you’re about to blow out a candle and exhale slowly through them for four or five seconds. Continue for four to five minutes, or until your breathing feels controlled again. You can use this technique anytime, anywhere, including during exercise when your breathing starts to feel labored. There’s no minimum session length or daily quota. It works as both a standalone practice and an in-the-moment tool.
Alternate Nostril Breathing
This yoga-based technique (called Nadi Shodhana or Pranayama) involves closing one nostril at a time and alternating which side you breathe through. It sounds unusual, but the measured effects are real. A 2021 study on healthy young adults found that one month of daily alternate nostril breathing significantly improved forced vital capacity (how much air you can exhale after a full breath), the volume of air you can push out in one second, and peak airflow rate. Participants also saw drops in resting pulse and blood pressure, likely because the technique shifts your nervous system toward a calmer, parasympathetic state.
To try it: sit comfortably, close your right nostril with your thumb, and inhale through your left nostril. Close the left nostril with your ring finger, release the right, and exhale through the right. Inhale through the right, close it, and exhale through the left. That’s one cycle. Five to ten minutes of this daily is a reasonable starting point.
Rib Cage Mobility
Your lungs can only expand as far as your rib cage allows. If the joints between your ribs and spine are stiff, or if the muscles between your ribs are tight from hunching over a desk, you’re physically limiting how deep a breath you can take. Improving thoracic (mid-back) mobility is an overlooked piece of lung exercise that can produce immediate results.
A practical three-step approach works well here. First, check your posture: practice moving between a fully rounded (flexed) and fully arched (extended) position in your upper back, then settle into a neutral midpoint. Second, pair breathing with position. Try taking a full diaphragmatic breath while in a slightly extended posture, arms reaching overhead. The stretch through your rib cage creates more space for your lungs to fill. Third, add movement: slowly rotate your torso side to side or reach one arm overhead while inhaling, then switch sides. Pairing arm reaches with deep breaths mobilizes the rib cage in ways that static stretching alone doesn’t.
Even a few minutes of this before your breathing practice can noticeably deepen your inhale.
Aerobic Exercise
Walking, running, cycling, swimming, and jumping rope all train your heart and lungs to work as a more efficient unit. During aerobic activity, your breathing rate increases and your respiratory muscles work harder, which strengthens them over time the same way lifting weights strengthens your arms. The diaphragm, the intercostal muscles between your ribs, and even accessory muscles in your neck and chest all get recruited during vigorous breathing.
You don’t need extreme intensity. Sustained moderate activity, the kind where you can talk but not sing, is enough to drive respiratory adaptation. The key is consistency. Three to five sessions per week of 20 to 30 minutes gives your breathing muscles regular stimulus to get stronger and more efficient.
Resistance Devices for Your Breathing Muscles
Inspiratory muscle training (IMT) devices look like small tubes you breathe through against adjustable resistance. They force your diaphragm and intercostal muscles to work harder on each inhale, similar to adding weight to a squat. A meta-analysis of 25 studies involving 522 athletes found that respiratory muscle training significantly increased both inspiratory and expiratory muscle strength. Soccer players in particular showed improvements in lung function measures and physical performance.
These devices are available over the counter and typically involve breathing through the resistance for a set number of breaths, once or twice a day. They’re most useful for people who want to go beyond basic breathing techniques, whether you’re an athlete looking for an edge or someone recovering from a respiratory illness. That said, the research quality in this area is still limited, so think of IMT as a supplement to the fundamentals rather than a replacement.
How to Track Your Progress
A peak flow meter is a simple, inexpensive handheld device that measures how fast you can push air out of your lungs. Normal adult readings fall between 400 and 700 liters per minute, while children typically range from 150 to 450. But the number that matters most is your personal best, not a population average. To find it, measure your peak flow several times a day over two weeks while breathing feels good, and record the highest number you hit.
From there, you can use a traffic-light system: readings at 80% to 100% of your personal best mean things are going well, 50% to 80% signals a decline worth paying attention to, and below 50% means something is seriously off. Even if you don’t have asthma or COPD, tracking peak flow over weeks of breathing practice gives you concrete evidence that your routine is working.
Signs You’re Overdoing It
Breathing exercises are low-risk, but it’s possible to hyperventilate if you breathe too forcefully or too quickly, especially when you’re first learning. Warning signs include dizziness, lightheadedness, tingling in your hands or around your mouth, muscle spasms in your hands or feet, and chest tightness or palpitations. If any of these show up, stop the exercise and return to your normal breathing pattern. The symptoms typically resolve within a few minutes.
The most common mistake is trying to force enormous breaths instead of focusing on slow, controlled movement of the diaphragm. Depth matters more than volume. A calm, full breath that moves your belly will always be more productive than a gasping, chest-heaving inhale that leaves you dizzy.