When people find out you are a freediver, the first thing they usually say is: "Wow, you must have massive lungs!"
While it is true that professional freedivers often have a larger Total Lung Capacity (TLC) than the average person, sheer size isn't everything. In freediving, flexibility is far more important than raw volume. A flexible rib cage and a strong diaphragm allow you to take in more air at the surface and, crucially, survive the immense pressure of the ocean at depth without injury.
If you want to improve your breath-hold and dive deeper safely, here are the best exercises to increase your lung capacity and thoracic flexibility.
1. Uddiyana Bandha (The Stomach Vacuum)
Borrowed from ancient yoga practices, this is arguably the most powerful exercise for freedivers. It stretches the diaphragm upwards, making it incredibly flexible.
- Stand up, bend your knees slightly, and rest your hands on your thighs.
- Exhale completely until your lungs are entirely empty.
- Without breathing in (keep your airways closed), perform a "mock inhale" by expanding your rib cage.
- This creates a vacuum that pulls your stomach violently up and under your ribs.
- Hold for a few seconds, release the vacuum, and then inhale gently. Do this every morning on an empty stomach.
2. Full Empty-Lung Stretches
When you dive deep, the pressure compresses the air in your lungs, pulling your chest inward. You can simulate this pressure on land using empty-lung stretches.
- Sit comfortably on a yoga mat.
- Take a deep breath in, then exhale absolutely all the air out of your lungs.
- While keeping your airways closed (no air in), gently stretch your arms above your head, and slowly bend to the left, then to the right.
- You will feel a deep, intense stretch in your chest and ribs. This prepares your body for the compression of a deep dive (and helps prevent lung squeeze).
- Start gently with just a few seconds per stretch. Stop immediately if you feel sharp pain or dizziness, and never do empty-lung exercises in the water.
3. Segmented Breathing (3-Part Breath)
This exercise teaches you how to fill every single compartment of your lungs, ensuring you maximize your capacity before a dive.
- Step 1: Breathe into your belly (diaphragm) until it pushes out.
- Step 2: Continue the same inhale, but now expand your lower ribs outward to the sides.
- Step 3: Finally, bring the last bit of air into your upper chest and collarbones.
- Hold for a second, then exhale slowly in reverse order (chest, ribs, belly).
4. Intercostal Massage and Stretching
The intercostal muscles sit between your ribs. If they are tight, your chest cannot expand.
- Use a foam roller or a tennis ball on your upper and middle back to loosen the tissue.
- Do the "doorway stretch": stand in a doorway, place your forearms on the door frame, and lean forward gently to open up your chest muscles.
The Myth of "Packing"
You may see YouTube videos of advanced freedivers "packing" (gulping extra air into their lungs using their tongue and cheeks after a full inhale). Beginners should never attempt lung packing. It is an advanced technique that should only be learned from an instructor, and doing it improperly can injure your lungs or make you faint. Focus on stretching and flexibility instead!
By incorporating these stretches into your daily routine, you will quickly notice that your "full breath" is suddenly much bigger, and your dives feel far more relaxed. Combine these stretches with yoga for freedivers and our dry breath-hold training tips. Ready to put those flexible lungs to the test? Book your Wave 1 Training with us today.