leve-leve freediving & yoga中文

Learn › Technique

The Duck Dive in Three Steps: You Are Not Going Down on Your Arm Pull

Fold, pull, kick — in that order. Most beginners pull too early and too hard, believing the arm stroke is what takes them down. What actually sinks you is the moment your body goes from horizontal to vertical. Includes a way to check whether your duck dive is straight.

Safety first. The duck dive is the doorway to a descent, and no descent happens without a buddy. Shallow water blackout gives no warning, and breath-hold diving alone is the single most dangerous thing in freediving, without exception. This article is about technique, not a list to go and practise by yourself.

The duck dive is the movement that takes you from lying flat on the surface to travelling vertically downward. The name comes from the bird — head drops, body tips, and the whole animal is gone, with nothing left behind on the surface.

Almost every beginner does this with far too much effort. The most common fault is rushing the arm pull, believing that a harder stroke means a faster descent. The order is backwards.

Three steps, and the order cannot change

  1. Fold. Take your body from flat to vertical. This is the most important step.
  2. Pull. Once step 1 is done, your body will sink a short way on its own. As that momentum is about to run out, add one arm pull.
  3. Kick. As the momentum from step 2 is about to run out, begin finning.

If you can do those three things and get the timing right, you have the essence of the duck dive: descending without spending energy.

Each step waits until the previous one has nearly run out. That is why the order cannot change, and why rushing the arm pull ruins the whole thing — you insert a new movement while the old one is still working, the two cancel each other out, and you end up slower and more tired.

Why the fold alone takes you down

This is worth understanding properly, because once you do, you stop wanting to pull with your arms.

Think of your hips as a pivot.

Lying flat on the surface, your body is spread out at 180 degrees. In the moment of the duck dive, your upper body folds down around that pivot to 90 degrees — and around the same pivot, your legs are carried upward.

Here is the part that matters: all the water that was lying on the backs of your thighs now becomes the force that drives you down. As the legs rise, the layer of water that was holding them up — and pressing on them — has nothing left to rest on. It falls in over you and sends you down.

Once your legs and fins are clear of the surface they are genuinely heavy, with no buoyancy holding them up at all, and they keep pressing like a piston.

Seen from the other side, this is the same thing as saying the legs stop displacing water and you lose that buoyancy — the water is no longer holding them up, so the weight comes back to you. Thinking about the pivot is just easier to feel in the water.

The fold does a second thing at the same time: as the body goes from horizontal to vertical, the cross-section facing your direction of travel shrinks and drag drops with it. But that is secondary. The pivot and the water coming in over you are what does the work.

So what you get is free depth — you have travelled some distance before a single kick. A freediver with a clean duck dive spends almost no energy on the first few metres. A freediver with a sloppy one has to kick immediately to fight their own buoyancy, wasting oxygen and making noise at the same time.

The duck dive is about descending with the least effort possible — sliding into the sea. Picture a slug sliding off the leg of a table.

Nine things worth remembering

  1. The duck dive is the least-effort way down — sliding into the sea. Picture a slug sliding off a table leg.
  2. Three steps: fold → pull → kick.
  3. The arm pull is only the last assist. You do not go down on your arms, you go down on the fold.
  4. The fold is the process of going from horizontal to vertical: around the hip pivot, the water that was on the backs of your thighs becomes the force that sends you down, and drag drops at the same time.
  5. Only when you have fallen as far as you are going to fall do you add the pull.
  6. Do not pull early, and do not panic and reach for your arms because you feel you are not going down.
  7. To really train the duck dive, practise it without the arm pull at all.
  8. Train the straight line first, against a wall or a rope. You may add finning.
  9. A duck dive with no arm pull, followed by finning, is a mirror that shows you the truth.

How to use that mirror

Point 9 deserves its own section, because it is a check you can run on yourself — with someone watching, always.

Take the arm pull away. Duck dive, then go straight into finning, and watch two things:

The arm pull hides both of these faults — pull, and you go down regardless, so you never notice your body is crooked. Take the assist away and the truth about the movement surfaces. That is why point 7 asks you to train without it.

Recap