Freediving Breathe-Up Technique - How to Breathe Before a Dive

The freediving breathe-up is the calm breathing you do on the surface before a dive. It is one of the most misunderstood parts of the sport. Many new divers assume it is about cramming in as much oxygen as possible, so they breathe hard and fast. In reality, the best breathe-up is quiet, slow and almost boring - and that is exactly why it works.

This guide explains how to breathe before freediving, how to take a safe final breath, how to use recovery breathing when you surface, and why hyperventilation is one of the most dangerous habits a freediver can have. Breathe-up technique is best learned in person on a course with a qualified instructor, but understanding the principles will help you practice correctly.

What the breathe-up is actually for

A breathe-up has three goals:

1. Lower your heart rate and calm your nervous system.
2. Release tension in your body so you use less oxygen during the dive.
3. Settle your mind so you start the dive focused and relaxed.

It is not for loading extra oxygen. At normal breathing, your blood is already very close to fully saturated with oxygen. Breathing harder does not meaningfully increase the amount you carry. What it does do is blow off carbon dioxide, which is the part that causes problems.

Why hyperventilation is dangerous

Hyperventilation means breathing faster or deeper than your body needs. Before a breath-hold it feels helpful, because it delays the urge to breathe. That is the danger.

The urge to breathe is driven mainly by rising CO2. When you hyperventilate, you start the dive with unusually low CO2, so it takes longer for that warning signal to arrive. Meanwhile, your oxygen falls at its normal rate - or faster, if you are working hard. You can reach dangerously low oxygen levels before you feel any real need to surface, and then black out with little or no warning.

Hyperventilation can also cause tingling in the fingers and lips, lightheadedness and muscle cramps. If you notice any of these during a breathe-up, slow down and return to normal breathing. Read our guide to freediving blackout and samba to understand what happens when oxygen runs too low.

How to do a relaxed breathe-up

Find a comfortable position

On the surface, most freedivers either float face down holding the buoy, breathing through a snorkel, or lie on their back. Choose the position in which your body is most relaxed and you are not working to stay afloat. Correct weighting helps a lot here - our freediving weight calculator guide explains how to get it right.

Breathe with your diaphragm

Diaphragmatic or belly breathing means letting your belly rise as you inhale, rather than lifting your shoulders and chest. It is more efficient and much more relaxing.

To practice on land:

• Lie on your back with one hand on your belly and one on your chest.
• Breathe in slowly through your nose or mouth so the hand on your belly rises first.
• Let the chest follow gently, without lifting your shoulders.
• Exhale slowly and passively, letting the belly fall.

Use a longer exhale

A simple, widely taught guideline is to make your exhale about twice as long as your inhale. For example, breathe in for a count of about four and out for a count of about eight. Do not treat this as a strict rule. The point is that slow, longer exhales calm the body.

Some divers add a brief pause after exhaling. Others find a gentle pursed-lip exhale, as if breathing out through a straw, helps them slow down. Experiment on land and keep what feels relaxed.

Keep the breathing rate low

A relaxed breathe-up typically lands at a slow, comfortable rate - a handful of breaths per minute rather than the dozen or more of normal everyday breathing. If you notice you are breathing fast, that is a signal to slow down, not speed up.

How long to breathe up

For most recreational dives, a breathe-up of around two minutes is a good starting point. Deeper or longer dives call for more surface time between dives to recover fully. A common rule of thumb among instructors is to rest on the surface for at least two to three times as long as the dive itself, and longer as depth increases. Your buddy also needs time to recover after their dive before they can act as your safety diver.

The final breath

At the end of the breathe-up comes the final breath - the one you take into the dive. For beginners, this should be full but comfortable.

A simple way to take it:

1. Exhale fully but without straining.
2. Inhale first into your belly, letting it expand.
3. Continue filling into your lower ribs and then your upper chest.
4. Stop when you feel comfortably full - not stretched, not tight.
5. Close your airway, relax your face and shoulders, and begin your duck dive.

The final breath should feel smooth and quiet. If you feel strain in your chest or throat, you have taken too much or forced it.

What about lung packing?

Lung packing - adding extra air on top of a full breath using a gulping technique - is used by some advanced and competitive divers. It is not appropriate for beginners. It raises the risk of fainting at the surface, of lung injury and of overstretching, and it is not needed for recreational depth. If you ever want to learn it, do so later with an experienced instructor.

Recovery breathing after you surface

The most dangerous moments of a dive are often the first seconds after you surface. Oxygen in the blood can keep falling briefly even after you start breathing again, which is why surface blackouts and samba happen. Recovery breathing, often called hook breathing, helps refill oxygen quickly.

A typical recovery breath looks like this:

1. As you surface, exhale only a small amount of air, or none at all, depending on what your instructor teaches.
2. Take a quick, full inhale.
3. Hold briefly with slight pressure for one or two seconds, as if gently bearing down with your airway closed.
4. Exhale partially and repeat.

Do at least three recovery breaths after every dive. While you breathe, hold on to the buoy or line, keep your face out of the water and let your buddy see your face clearly. Many divers also give an OK sign once they feel recovered.

Common breathe-up mistakes

• Hyperventilating. Fast, deep breathing hides warning signs and increases blackout risk.
• Breathing with the chest and shoulders. This is tiring and creates tension. Breathe from the belly.
• Rushing the breathe-up. A short, anxious breathe-up leaves your heart rate high. Take your time.
• Forcing the final breath. Straining for a huge final breath creates tension and can make you lightheaded.
• Skipping recovery breathing. Every dive, without exception, should end with proper recovery breaths.
• Talking too much on the surface. Chatting during your breathe-up raises your heart rate. Keep it calm and quiet.
• Diving without a buddy watching. Even a perfect breathe-up does not protect you from blackout. Always follow the freediving buddy system.

How to practice breathing on land

You can improve your breathe-up every day without going near water:

• Spend five minutes a day lying down practicing slow belly breathing with a longer exhale.
• Practice your final breath technique several times, focusing on smooth filling without strain.
• Rehearse recovery breathing so it becomes automatic when you surface tired.
• Combine breathing practice with relaxation exercises, as covered in our guide on how to hold your breath longer.

Good breathing technique is one of those skills that keeps improving for years. Train it with a trusted partner whenever you can - and if you are looking for divers to practice with, BuoyBuddy, our freediving buddy-finder app coming soon to iOS and Android, is designed to help you find buddies and join sessions near you.

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