What Is Buteyko Breathing, and Does It Help With Anxiety or Asthma?
Quick answer
Buteyko breathing is a technique built around gentle nasal breathing and deliberately reduced breath volume, developed originally for asthma. Clinical trials support it reasonably well for reducing asthma symptoms and inhaler use. The evidence for anxiety specifically is much thinner than for asthma, so it's worth trying as one option among several rather than assuming it's the strongest breathing technique for calming down.
Want to try this yourself? Open the Breathe page.
Buteyko breathing stands apart from most of the breathing techniques covered elsewhere on this site because it isn't built around a slow count or a long exhale. Instead, it asks you to breathe less than you normally would, gently and mostly through the nose, based on a theory about carbon dioxide and airway function.
The theory behind reduced breathing
Konstantin Buteyko, the Ukrainian physician who developed the method in the 1950s, argued that many people, particularly those with asthma, chronically overbreathe, taking in more air than their body actually needs. His theory was that this lowers blood carbon dioxide to a point that actually makes airways more reactive and prone to constriction, and that training toward calmer, shallower, nasal breathing could ease that reactivity over time.
What the practice actually looks like
A typical Buteyko session involves breathing gently through the nose, keeping breaths small and quiet rather than deep, and periodically measuring a "control pause," exhaling normally and timing how long you can comfortably wait before the first urge to breathe again. A longer comfortable pause is treated as a rough sign of improved carbon dioxide tolerance and calmer baseline breathing. It's a slower, more deliberate practice than something like box breathing, built more around retraining a daily habit than a quick in-the-moment fix.
Where the evidence is strong, and where it isn't
The strongest evidence for Buteyko breathing is in asthma management. Multiple clinical trials have found it can reduce reliance on reliever inhalers and improve asthma-related quality of life, generally studied as a complement to standard medical treatment rather than a substitute for it. The evidence for anxiety specifically is considerably weaker, there's some conceptual overlap with other slow, controlled breathing methods known to calm the nervous system, but far less direct research targeting anxiety outcomes than exists for techniques like the physiological sigh or coherent breathing. It's also close to the opposite of Wim Hof breathing, which deliberately overbreathes before each hold.
If you're looking for a technique with a larger anxiety-specific evidence base to try alongside this one, our comparison of the physiological sigh and box breathing is a reasonable next read, and the Breathe page has guided visuals for several paced-breathing patterns if you'd rather follow along than count.