The Freediver's Equalization Guide: Valsalva, Frenzel & Beyond

Ask any instructor what stops beginners from going deeper. Not breath-hold. Not fear. Ears. Equalization is the true gatekeeper of depth — and the most coachable skill in the sport.

What's happening in your head

Descend, and water pressure squeezes the air spaces in your middle ears and sinuses. Unless you push air into them through the Eustachian tubes, you feel pressure, then pain, then risk injury. "Equalizing" is simply refilling those spaces to match ambient pressure — early and often, before discomfort, never through pain.

Valsalva: the beginner's reflex

Pinch your nose and gently blow. It works — briefly. Valsalva uses your chest and diaphragm to push air up, and past 10–15 metres your compressing lungs can no longer supply it. It also creates tension exactly where freediving demands relaxation.

Frenzel: the real technique

Frenzel uses the tongue and throat as a small pump, pushing air from the mouth and throat into the ears while the chest stays completely relaxed. It works deeper, costs less oxygen, and is the standard taught in every serious course.

Dry-land starter drill: pinch your nose, seal the back of your tongue against your soft palate as if saying a hard "K", then push the middle of your tongue upward like swallowing with the tip anchored behind your teeth. Feel the ears click or flex — that's the mechanism. Ten minutes a day for a week beats an hour the night before your course.

When it won't work

Congestion, allergies, or a cold can block the tubes entirely. The rule is simple: can't equalize, don't descend. Never dive congested, never "push through," and never take decongestants to dive — they can wear off at depth.

Frenzel is exactly the kind of skill that clicks fastest with an instructor watching your throat, which is half of what the PADI Freediver course mornings are for.