Your first 20 hours of freediving
The depth records are irrelevant. In your first 20 hours, you're learning one thing: how to stop fighting the water and let it carry you down.
By The JustBeginning Editors · Published May 24, 2026
Freediving has an unusual learning curve. It doesn’t get harder as you go deeper — it gets easier, because depth is what happens when you stop trying. The first twenty hours are about learning to be still, to equalize without panicking, and to trust the physics that wants to pull you down.
There’s a right order to this. Don’t skip it.
Before anything else: take a course
This isn’t a liability disclaimer. It’s the one piece of advice that actually changes your experience.
An AIDA 1 or PADI Freediver course takes one to two days. A pool session, classroom time on breathing and equalization physiology, and some shallow open-water dives. The course costs $150–400 depending on where you are and who’s teaching it. What it gives you is worth far more: correct breath technique, proper equalization mechanics, and — most importantly — the buddy-system protocols that keep you safe.
Shallow water blackout is the leading cause of freediving fatalities. It’s a loss of consciousness that happens on the ascent — often at 5–10 meters — after the diver feels completely fine. No warning signs. It can happen to experienced divers. The only thing that prevents it from being fatal is a trained buddy who knows what to look for and how to respond. No course means no safe way to practice in open water.
Book the course before you buy anything except a mask. Your instructor will tell you what weight to use, verify your equalization, and catch problems in technique before they become habits.
Hours 1–5: The pool
Your first real freediving sessions will be in a pool, and they’ll feel nothing like diving. You’ll spend the first hour doing static apnea — lying face-down in the water, not moving, just holding your breath for as long as comfortable.
It’s boring. It’s also the entire foundation of the sport.
Static apnea teaches you what tension actually costs. Every time your shoulders creep up or your jaw clenches, you burn oxygen. The goal is to find the position where you use almost nothing — arms loose, neck relaxed, fins pointing straight back. When you get there, your breath-hold time doubles before you’ve practiced a single dive.
Diaphragmatic breathing is the technique your instructor will drill before you get in the water. Breathe into your belly, not your chest. Full exhale first, then a slow, deep inhale that fills from the bottom up. It feels odd for the first ten minutes and natural after thirty. This is the breath you take before every single dive for the rest of your life in the sport.
Equalization is where most beginners get stuck. Your ears and sinuses need to equalize to the increasing pressure as you descend — the same process as in an airplane, but faster and more deliberate. The Frenzel technique (using your tongue as a piston to push air against a closed glottis) is more efficient than the Valsalva maneuver most people use by default. Your instructor will teach it. It takes an hour to understand and a week of practice to make automatic.
If equalization hurts, stop descending. Never force it. A perforated eardrum ends your diving season and takes months to heal.
Pool dives in the first five hours should be no deeper than 5–10 meters. You’re practicing mechanics, not chasing depth. A smooth, relaxed 8-meter dive tells you far more than a struggling 12-meter attempt.
Hours 6–12: First open-water dives
The ocean feels different. Your buoyancy changes (salt water floats you higher than a pool), your visibility expands, and you’re clipped to a line with a buoy on the surface.
This is where the sport becomes what it actually is.
The dive line is your reference, not a constraint. Most beginner freedivers use a weighted line descending from the buoy to whatever target depth they’re working toward. You pull down hand-over-hand to get below your positive buoyancy (usually around 8–10 meters), then glide the rest of the way. The pull-down part is work. The glide is silence.
At around 8–12 meters, depending on your body and wetsuit, you’ll hit neutral buoyancy — the point where you’re neither sinking nor floating. Below that depth, the ocean does the work. You stop kicking. You let go of the line. And you fall.
This is the moment that turns curious beginners into freedivers.
Your equalization needs to run ahead of your depth. Don’t wait until your ears hurt to equalize — do it constantly, every meter on the way down. If you can’t equalize at 5 meters, don’t push to 8. The descent is slow enough that you should never feel pressure on your ears.
The ascent is where discipline matters most. Kick slowly. Don’t rush. Your blood oxygen is lower on the way up than at the bottom — which sounds wrong but is the correct physiology. The last 5 meters are the riskiest. Move calmly, look up at the light, and break the surface without rushing.
Your buddy is watching your face when you surface. That’s their job. You breathe; they observe. The protocol is the same every time: surface, breathe, signal OK with eye contact. If you don’t signal within 30 seconds of surfacing, your buddy is coming in after you. That’s the agreement.
Hours 13–20: Technique over depth
At some point in this range — probably around hour fifteen — a dive will feel easy. Not shorter, not shallower, but genuinely comfortable. The equalization runs automatically. The negative phase, where you’ve exhaled and the water holds you under its own weight, doesn’t feel claustrophobic. The surface comes up and you’re not gasping.
That’s the inflection point.
What you’re actually developing is a dive reflex. Your body is starting to adapt: heart rate slowing, peripheral blood vessels constricting to shift blood to core organs, spleen releasing stored red blood cells. None of this is conscious. All of it gets stronger with practice. The physiological adaptation is real and measurable — regular freedivers develop noticeably stronger reflexes than non-divers.
Depth is a byproduct of this, not a goal in itself. Chasing depth before your equalization is automatic leads to forced dives, sinus pain, and bad habits. Freedivers who progress fastest in the first year are the ones who spent time at 10 meters perfecting the descent line, not the ones who pushed to 20 and came up gasping.
The things to focus on in hours 13–20:
- Streamlining. Arms at your sides during the descent, not stretched above your head. Head neutral, not craned to look down. Every surface you present to the water costs you air.
- Fin technique. Long, slow kicks from the hip, not the knee. Freediving fins need a different motion than swimming fins — the blade is too long and stiff to kick from the ankle.
- Recovery breathing. After a dive, three to five slow recovery breaths before you breathe normally. Rushing back to conversation-breathing shortens your surface interval and accumulates fatigue across multiple dives.
Things you’ll fail at — and that’s expected
Equalization will be inconsistent for weeks. Your right ear might clear fine; your left might hold. Different days, different results. This is normal and temporary. Keep the technique correct and it normalizes.
You’ll rush the ascent. Every beginner does. The urge to get to the surface faster when you feel the need to breathe is natural and incorrect — moving faster uses oxygen and disrupts streamlining. Practice slowing down specifically when you feel the impulse to speed up.
Buoyancy will take dives to dial in. Too much weight and you’ll be fighting to ascend. Too little and the surface interval is exhausting treading water. Get your instructor to help you calibrate during your first open-water session.
You’ll forget your buddy protocol in the excitement. Signal OK every single time you surface. Make it automatic in the pool so it happens automatically in the ocean.
What comes next
Twenty hours in, you’re an AIDA 1 or PADI Freediver — genuinely safe to dive in open water with a trained buddy. The next step is AIDA 2 or PADI Advanced Freediver, which takes most divers to 20–30 meters and introduces more sophisticated breath-work and equalization techniques.
Depth in freediving is a long game. The best athletes in the sport measure progress in years, not months. But “best athlete” is beside the point for most people — freediving at 15 meters in warm, clear water, watching parrotfish ignore you because you’re silent enough not to matter, is already one of the best experiences available in the ocean.
You don’t need to go deeper to love it.
Ready to gear up? See the freediving gear guide for the mask, fins, and wetsuit that take you from pool to open water.