Frenzel equalization for freediving

What Frenzel actually does

Frenzel uses the tongue and throat structures to compress air in the upper airway while the chest stays relatively quiet. This makes it more efficient for freediving than relying on a strong push from the lungs.

Frenzel vs Valsalva

Valsalva depends more on pressure generated from the chest. Frenzel relies more on coordination of the tongue, glottis and soft palate. That distinction matters as lung volume reduces during descent.

The three pieces to understand

• Glottis: controls whether air can move between lungs and throat.
• Soft palate: helps direct pressure toward the nose and middle-ear pathway.
• Tongue: acts like a piston to compress the trapped air.

Common mistakes

The most common problems are equalizing too late, squeezing too hard, moving the chest instead of the tongue, losing coordination while upside down, or descending faster than the technique can keep up with.

How to practise

Dry practice can help you isolate the movement, but in-water application should stay slow and conservative. Technique should feel easier as it improves—not more forceful.

Learn with an instructor

Educational articles can help you understand the concepts, but equalization and safety skills should be developed progressively with direct feedback in an appropriate training environment.