Technique Guide • Equalization
How to Equalize for Freediving (and Fix It When It Won't Work)
Valsalva vs Frenzel, when to equalize, and the fixes for the most common problems — explained the way we teach it in class.
Short answer
Equalize early and often — every 1–2 meters, starting at the surface, always before you feel pressure. Beginners start with Valsalva (pinch nose, gentle exhale pressure); the proper freediving technique is Frenzel (pinch nose, throat closed, tongue pushes air up like a piston), which works head-down and at depth. If your ears won't clear: stop, ascend a meter, retry — never push through pain.
WHAT'S ACTUALLY HAPPENING IN YOUR EARS
As you descend, water pressure squeezes the air space behind your eardrums. Equalizing pushes air from your throat through the Eustachian tubes into the middle ear, balancing the pressure so the eardrum sits neutral again. That's all it is — a tiny top-up of air, repeated every couple of meters. Done early, it's effortless. Done late, the tubes get pinched shut by the pressure difference and no amount of force will open them safely.
VALSALVA VS FRENZEL
Valsalva — the starter
Pinch your nose and create gentle exhale pressure, as if blowing softly into your blocked nose. It works in the first meters and is how most people equalize on airplanes. The catch: it uses your chest and diaphragm, gets harder when you're head-down, costs oxygen, and adds tension exactly when you want to relax.
Frenzel — the freediver's tool
Pinch your nose, close your throat (like the start of a hard "k"), and push the back of your tongue up and back — a piston compressing the air in your mouth into your ears. Fast, gentle, repeatable, works upside down. This is what freediving courses teach, and most students get it within one coached session.
WHY YOUR EQUALIZATION FAILS (AND THE FIX)
You equalize too late
Waiting for pressure or pain means the tubes are already pinched. Fix: pre-equalize at the surface, then every 1–2m on the way down — before you feel anything.
You're looking down
Extending your neck to see the bottom stretches and narrows the Eustachian tubes. Fix: keep your chin tucked, head neutral, and trust the line.
You're congested
Colds, allergies, and dairy-heavy mornings swell the tissue around the tubes. Fix: don't dive congested — rebook. Decongestants before diving are risky (they can wear off at depth).
You're tense or descending too fast
Tension closes the throat; speed outruns your equalization rhythm. Fix: slow down, relax your jaw and shoulders, and make equalization part of your descent rhythm — kick, kick, equalize.
The golden rule: equalization never hurts. If it does, the dive is over — ascend, smile, and try again with an earlier rhythm. Ears heal slowly; patience is cheaper.
EQUALIZATION FAQ
How do I equalize my ears when freediving?
Pinch your nose and gently push air into your middle ears — every 1–2 meters of descent, starting before you feel pressure. Beginners typically use Valsalva (gentle exhale pressure against the pinched nose); trained freedivers use Frenzel, which compresses air with the tongue while the throat stays closed. Equalization should feel effortless — never push through pain.
What's the difference between Valsalva and Frenzel?
Valsalva uses your chest and diaphragm to push air up — it works near the surface but gets harder head-down and at depth, and it adds tension. Frenzel closes the glottis and uses the tongue as a piston to compress air in the mouth and throat — it's faster, gentler, works upside down, and is the standard technique taught in freediving courses.
Why can't I equalize when I dive head-down?
Head-down, Valsalva struggles because air has to move 'up' against gravity toward your ears, and looking down stretches and narrows the Eustachian tube openings. Fixes: learn Frenzel, tuck your chin to neutral, equalize before you feel pressure, and slow your descent.
What should I do if my ears won't equalize?
Stop descending immediately. Ascend a meter, relax, and try again. If they still won't clear, end the dive — forcing equalization is how ear barotrauma happens. On the surface: don't dive with a cold or congestion, and practice your technique on dry land first.
How do I practice the Frenzel maneuver on land?
Pinch your nose, close your throat (as if about to say a hard 'k'), and push the back of your tongue up and back like a piston — you should feel your ears pop gently. Many students get it in one coaching session; it's a standard part of Molchanovs Wave 1 and AIDA 2 courses.
Does equalization hurt? Should I push through it?
Properly done, equalization is painless. Pain means the pressure difference is already too big — ascend and equalize earlier on the next attempt. Pushing through pain risks barotrauma (ear or sinus injury), which can keep you out of the water for weeks.
What is mouthfill?
Mouthfill is an advanced equalization technique where you store a reserve of air in your cheeks and mouth at moderate depth, then use it to keep equalizing deeper, where your lungs are too compressed to supply air. It's taught at advanced course levels (e.g., Molchanovs Wave 3) — beginners should master Frenzel first.
The takeaway: equalize early, equalize often, learn Frenzel, and never force it. Master this one skill and the ocean gets a lot deeper for you.
General educational information, not medical advice. If you have ear, sinus, or respiratory conditions, consult a doctor before freediving.