How long should a breathing session be?
Ninety seconds, five minutes or twenty? What the sensible answer is for different situations.
The short answer is that almost any length is worth doing, and the right one depends on whether you are trying to change how you feel right now or trying to build something over weeks.
Under two minutes: the reset
For an acute moment — before a difficult conversation, after something has gone wrong, in the ninety seconds between meetings — two or three breaths of a physiological sigh is often enough to take the edge off. You will not transform your afternoon, but you can change your state enough to think.
This is the length people actually use most, because it is the only one that fits into a real day without negotiation.
Three to five minutes: the useful default
This is long enough for the physical signs to show up — the shoulders dropping, the jaw releasing — and short enough that you will actually do it. Most sessions on this site default to somewhere in this range.
The 2023 Stanford comparison of breathing practices used five minutes a day for a month, which is a reasonable model for a daily habit: short, repeatable, and demonstrably enough to produce a measurable difference in that study.
Ten to twenty minutes: the practice
Most of the research protocols on resonance-pace breathing use ten to twenty minutes a day, often over several weeks. If you are interested in whether regular practice changes anything for you over time, this is the version to test.
Be realistic about it. Twenty minutes a day is a genuine commitment, and five minutes done daily beats twenty minutes done twice and then abandoned.
Is longer better?
Not automatically. Slow breathing takes some effort to maintain, and past the point where it stops being comfortable you are mostly practising being uncomfortable. There is also no evidence that an hour is proportionally better than ten minutes.
The exception is at bedtime, where the session ending is not really the point — you are aiming to stop paying attention altogether. Set a longer duration, turn off the end chime in Settings, and let it fade out rather than announce itself.
Every session on this site lets you pick the length before you start, and every one finishes on a complete breath rather than cutting off mid-inhale. You can pause at any point with the space bar and pick up exactly where you left off.
Where this comes from
Starting points for reading rather than a systematic review. None of these authors are connected with this site.
- Balban MY, Neri E, Kogon MM, et al. (2023). Brief structured respiration practices enhance mood and reduce physiological arousal — Cell Reports Medicine. A randomised comparison of five minutes a day of cyclic sighing, box breathing, cyclic hyperventilation and mindfulness meditation over one month, in 108 adults. Cyclic sighing came out ahead on daily mood and reduction in breathing rate. One of the few head-to-head trials in this area; still a single study with self-reported mood outcomes.
- Lehrer PM, Gevirtz R. (2014). Heart rate variability biofeedback: how and why does it work? — Frontiers in Psychology. Where the "resonance frequency" idea comes from — the observation that heart rate variability peaks at a particular slow breathing pace, around five to six breaths a minute for most adults. This is the reasoning behind Coherent Breathing on this site.
This is information, not medical advice
Breathing exercises are not a treatment for any condition, and nothing here is tailored to your situation. See the medical disclaimer, which lists the circumstances in which you should speak to a clinician before trying these.