The Didgeridoo Study: What a Wind Instrument Trial Revealed About Snoring

In February 2006 the BMJ published a randomised controlled trial with a title that reads like a joke and a result that is not one: didgeridoo playing as a treatment for obstructive sleep apnoea.

It is worth understanding properly, because the mechanism it demonstrates underpins the only exercise-based snoring intervention with decent evidence behind it — and because it is a useful case study in what "evidence-based" actually looks like at this end of the field.

The trial

Puhan and colleagues randomised 25 patients with moderate obstructive sleep apnoea — an apnoea-hypopnoea index between 15 and 30 — who also complained of snoring. The intervention group received didgeridoo lessons and practised at home with standardised instruments for four months. The control group waited.

The result: regular didgeridoo playing reduced daytime sleepiness and snoring in people with moderate obstructive sleep apnoea.

Note what the trial is and is not. Twenty-five people is small. The intervention was four months of committed daily practice, not a fortnight of enthusiasm. It was conducted in people with diagnosed moderate apnea, not in general snorers. And it was published in a major journal, randomised, and controlled — which puts it well above almost everything else in the snoring-remedy landscape.

Why it works, which is the actually useful part

Nothing about the instrument is magic. What the didgeridoo demands is circular breathing — maintaining a continuous outward drone by pushing air from the cheeks while inhaling through the nose — combined with sustained resistance against the lips and prolonged, controlled activation of the muscles of the soft palate, pharynx and tongue.

That is a resistance training programme for the upper airway dilator muscles, delivered daily for four months, disguised as a musical hobby.

Snoring and obstructive apnea are, mechanically, problems of a collapsible airway. Tissue that is more toned collapses less. If you can strengthen the muscles that hold the pharynx open, the airway should narrow less during sleep — and that is precisely what the trial suggests happened.

The wider evidence

The didgeridoo trial is the famous one, but it is not alone.

A systematic review and meta-analysis published in the Journal of Clinical Sleep Medicine examined the effect of playing a wind instrument or singing on sleep apnea risk. The broad picture is consistent with the didgeridoo finding: activities that repeatedly load the upper airway musculature are associated with better outcomes, though effects across studies are modest and the research base remains limited.

Meanwhile oropharyngeal exercises — the direct version, without the instrument — have their own trial evidence for reducing snoring and mild-to-moderate apnea severity. They are the practical implementation of everything the didgeridoo study implies. The exercises themselves, and what the trials found.

What to do with this

If you want the effect without buying a didgeridoo, do the exercises. They take ten to fifteen minutes a day, require nothing, and have direct trial evidence. The catch is that they take around three months to show an effect and most people quit in week three, which is the same commitment problem the didgeridoo trial solved by making it a hobby.

If you play a wind instrument already, you are probably getting some of this for free.

If the idea of learning the didgeridoo genuinely appeals, there is nothing wrong with it. Four months of daily practice produced a measurable result in a controlled trial, which is more than can be said for most anti-snoring purchases. The reason to do it is that you would enjoy it — adherence is the entire mechanism, and nobody sustains four months of daily practice at something they find tedious.

What this is not: a treatment for sleep apnea to be pursued instead of medical care. The trial participants had diagnosed moderate apnea and were studied under supervision. If you have witnessed breathing pauses, gasping awake, or heavy daytime sleepiness, get assessed rather than taking up an instrument. Where the line sits.

Where it sits on the evidence tiers

Tier 2 — plausible and low risk, with real but limited evidence. A small randomised trial, a plausible and well-described mechanism, supporting work on wind instruments and singing, and a closely related intervention (oropharyngeal exercises) with its own trial base.

That places it above the great majority of things sold for snoring, which sit at tier 3 — widely marketed, no good evidence. It places it below weight change, positional therapy and mandibular advancement, which have larger and more consistent evidence behind them. The full ranking.

The broader point

The didgeridoo study is quoted for its novelty and it deserves better. Its real contribution is demonstrating that the upper airway is trainable — that collapsibility is not purely a fixed anatomical fact but partly a matter of muscle tone, and that tone responds to loading like any other muscle.

That is a genuinely hopeful finding for anyone who has been told their snoring is simply how they are built. Some of it is. Not all of it.