Breathing timer: set your own rhythm, or pick a named technique

Which breathing technique should you use?

The honest answer depends on what you need right now. For a fast, one-off reset with no counting, the physiological sigh has the strongest single piece of evidence behind it. For a quick, structured reset before a specific stressful moment, box breathing is easy to count and remember. For falling asleep, 4-7-8 breathing's long exhale is built for that specific moment. For energy and alertness rather than calm, the Wim Hof method's fast breathing fits that goal, with real safety rules to follow, and Strelnikova breathing offers a gentler, hold-free version of the same fast-breathing family as a quick morning habit. For building a calmer baseline over time rather than reacting to one moment, the Buteyko method's control pause and reduced breathing has real evidence in asthma specifically. For an ongoing daily habit rather than an emergency tool, coherent breathing at about 5.5 breaths a minute is the simplest to sustain.

The seven breathing techniques, compared

Each technique below links to its own page with full instructions, the research behind it and its own FAQ.

What the 2023 Stanford trial found, comparing three techniques directly

A randomised controlled trial at Stanford University is the clearest side-by-side comparison available. 108 adults were split into four groups and practised 5 minutes a day for 5 weeks: one did box breathing, one did the physiological sigh (called cyclic sighing in the study), one did a fast-breathing pattern with a breath-hold in the same family as the Wim Hof method, and one practised mindfulness meditation with no set breathing pattern, used as the comparison group.

All four groups improved mood and reduced anxiety over the 5 weeks compared with their own starting point. The physiological sigh produced the largest improvement in positive mood and the largest drop in resting respiratory rate of the four, and its advantage over the others grew across the 5 weeks. Mindfulness meditation produced the largest reduction in negative mood specifically, a different measure. This one trial is the strongest single piece of evidence behind three of the seven techniques on this page.

Breathing exercises for anxiety and stress: what the wider research shows

The Stanford trial compared techniques with each other. A different question is whether breathing exercises in general help with stress and anxiety at all, compared with doing nothing or doing something else. A 2023 meta-analysis pooled randomised controlled trials of “breathwork”, meaning any deliberate control of the breath, against non-breathwork control conditions.

For self-reported stress, the main outcome, 12 trials with 785 adults were combined: breathwork was associated with lower stress than the control conditions, with a small-to-medium average effect. For anxiety (20 trials) and depressive symptoms (18 trials) the effects were of similar size. The authors also point out the limits: most trials were judged to be at moderate risk of bias, the results varied between studies, and they explicitly warn against a gap between the hype around breathwork and the evidence.

In practice this means breathing exercises are a reasonable, low-cost tool for everyday stress and anxious moments, with a real but modest effect, not a replacement for treatment of an anxiety disorder. For a sudden wave of anxiety, the simplest options on this page are the physiological sigh, which needs no counting, or a plain longer exhale on the pacer above: for example 4 seconds in and 6 seconds out, with both holds at zero.

Why do these seven rhythms affect the body differently?

These seven techniques do not differ in effect because one is simply “better” than another. They differ because they work through different mechanisms in the body. Most of them slow the breath down and calm the body; the Wim Hof method's fast breathing works in the opposite direction, and Strelnikova breathing shares that fast-breathing family without a hold, while the Buteyko method targets the breathing volume itself rather than its speed.

Box breathing and coherent breathing work through essentially the same mechanism: both slow the breathing rate toward roughly 4 to 6 breaths a minute, the range where heart rate variability and parasympathetic, calming nervous system activity rise the most in the reviewed research. Coherent breathing applies that pace most directly, with no holds; box breathing adds two 4-second pauses that slow the overall rhythm further, but those holds have no separate mechanism of their own beyond the slower pace.

The working part of 4-7-8 breathing is its long exhale: 8 seconds, longer than either the inhale or the hold, following the same extended-exhale principle as slow breathing in general. The specific 4-7-8 ratio has no dedicated study of its own, but the extended-exhale mechanism behind it is the same one at work in box breathing and coherent breathing.

The physiological sigh works two ways at once: the second, short top-up inhale reinflates alveoli that gradually collapse during ordinary breathing, and the long exhale that follows it uses the same slow-exhale mechanism as the other techniques here. In the 2023 Stanford trial, this double effect produced the largest drop in resting respiratory rate of the four techniques compared.

The Wim Hof method's fast breathing works in the opposite direction: deliberate hyperventilation lowers blood carbon dioxide, which the 2014 Radboud study linked to a rise in blood adrenaline and a changed immune-signalling response. This is a body-activating mechanism, not a calming one, which is why this rhythm differs from the slower techniques and suits energy rather than calm.

Strelnikova breathing shares the Wim Hof method's fast-breathing family, in short, sharp inhales, but no controlled trial has isolated its physiological effect, so its mechanism beyond repeated brief inhalation bursts is not established the way the Wim Hof method's is.

The Buteyko method works differently again: rather than changing the pace of breathing, it targets breathing volume itself, on the idea that habitually breathing more air than needed lowers blood carbon dioxide tolerance. The tradition frames a longer control pause as a sign of this improving; the three real asthma trials that tested the method measured a narrower, verified outcome: less rescue and steroid medication use, without a matching change in lung function.

How to use the timer above to set your own rhythm

The timer above starts set to box breathing: 4 seconds for the inhale, the hold, the exhale and the second hold. Each of the four values can be changed independently with its own slider, and setting a value to zero skips that phase entirely.

The same timer can be set to any of the four pacer-based techniques below without opening another page: for 4-7-8 breathing, set a 4-second inhale, a 7-second hold, an 8-second exhale and a 0-second second hold; for coherent breathing, set roughly 5 to 6 seconds for the inhale and the same for the exhale, and lower both holds to zero.

A soft chime marks the start of each phase, so there is no need to watch the screen and count seconds; an optional session timer stops the session automatically after the chosen number of minutes.

The Wim Hof, Strelnikova and Buteyko pages each use their own dedicated trainer instead of this timer, because their shape (breath counts, self-measured holds) is different from a fixed inhale-hold-exhale-hold rhythm.

All values are in seconds. Each slider goes from 0 to 15 seconds in whole seconds, so a pace such as 5.5 seconds is rounded to 5 or 6; the difference is too small to matter for practice.

Breathing exercises for sleep: slow breathing before bed

For falling asleep, two approaches on this page fit: 4-7-8 breathing, built around a long exhale, and plain slow breathing at about 6 breaths a minute. The second one has a small study behind it. In a 2015 study from Taiwan, 14 people who reported insomnia and 14 good sleepers had their heart rate variability and their night's sleep measured in a sleep laboratory. When the people with insomnia practised slow, paced breathing at 6 breaths a minute for 20 minutes before going to bed, they fell asleep faster, woke up less often and for less time, and their sleep efficiency rose.

This is a small study, and it measured one group's nights rather than comparing a large randomised group with a control group, so it shows what is possible rather than what to expect for everyone. To try the same rhythm, set the pacer above to 5 seconds in and 5 seconds out with both holds at zero, and use the 15-minute timer, so the pacer stops on its own when you are already in bed with the lights off. The chime can stay on, as the visual pacer is not needed once your eyes are closed.

Diaphragmatic (belly) breathing: how to do it and what one trial found

Diaphragmatic breathing, also called belly or abdominal breathing, means letting the diaphragm do most of the work: the belly rises on the inhale and falls on the exhale, while the upper chest and shoulders stay fairly still. A simple check is to lie on your back with one hand on the chest and one on the belly and breathe so that mainly the lower hand moves.

A 2017 randomised study in China tested this directly. 40 healthy adults were split into two groups; one trained diaphragmatic breathing for 20 sessions over 8 weeks, with a real-time feedback device and an average pace of 4 breaths a minute, and the other did not. After training, the breathing group showed lower negative mood than at the start, better sustained attention, and a lower level of the stress hormone cortisol in saliva, while cortisol in the control group did not change. It is one small study with feedback equipment, so it supports the idea rather than settles it.

To practise at a similar pace with the pacer above, set 6 seconds for the inhale and 9 for the exhale with both holds at zero: that is 4 breaths a minute. If that feels too slow at first, start with 4 in and 6 out and lengthen both over a few days.

Can deep breathing lower blood pressure?

Slow breathing is one of the few breathing questions with several meta-analyses behind it, and they do not fully agree. A 2019 meta-analysis of 17 randomised trials in people with high or borderline-high blood pressure, practising slow breathing at 10 breaths a minute or fewer, for at least 5 minutes on at least 3 days a week over at least 4 weeks, found an average drop of about 5.6 mmHg in systolic and about 3 mmHg in diastolic pressure. The authors called this a modest reduction and noted that the results varied a lot between trials.

A 2022 meta-analysis that looked specifically at slow breathing guided by a device, compared with usual care in people with hypertension, did not find a significant drop in either systolic or diastolic pressure, again with high variation between studies. Taken together: slow breathing may lower blood pressure a little in some people, the evidence is mixed, and it does not replace blood-pressure medication or a doctor's plan. Coherent breathing, at 5 to 6 seconds in and the same out, is the technique on this page closest to the pace used in these trials.

Pursed-lip breathing and breathing exercises for COPD

Pursed-lip breathing is taught to many people with chronic obstructive pulmonary disease (COPD): breathe in gently through the nose, then breathe out slowly through lips shaped as if about to whistle, usually with the exhale about twice as long as the inhale. On the pacer above that is 2 seconds in and 4 out, with both holds at zero.

A Cochrane review from 2012 pooled 16 trials with 1,233 people with COPD. Breathing exercises practised over 4 to 15 weeks improved how far people could walk in six minutes, with similar gains from yoga breathing, pursed-lip breathing and diaphragmatic breathing in the trials that tested them, but there were no consistent effects on breathlessness or quality of life, and no significant side effects were reported. A later meta-analysis of 15 trials with 1,098 patients, from English- and Chinese-language studies, found that pursed-lip breathing combined with diaphragmatic breathing improved lung-function measures and walking distance.

These exercises are part of pulmonary rehabilitation, not a substitute for it or for prescribed inhalers. If you have COPD, learn the technique with your doctor or respiratory physiotherapist, who can match it to your condition.

Breathing during a panic attack: why not a paper bag

Breathing into a paper bag is an old piece of advice for hyperventilation during a panic attack. In 1989 an American emergency physician reported three deaths in which the paper bag had been used on people who were in fact short of oxygen or having a heart problem, not simply hyperventilating from anxiety. In the same paper, 20 healthy volunteers who hyperventilated and then rebreathed into a paper bag had their oxygen levels fall within the first minute, and the fall kept growing over three minutes.

A safer approach during a panic attack is to slow the breath down rather than rebreathe your own air: a physiological sigh, or a few rounds on the pacer above with a longer exhale than inhale, such as 4 seconds in and 6 out. Chest pain, breathlessness that does not settle, or a first-ever attack with symptoms you cannot explain are reasons to call emergency services, not to keep breathing exercises going.

How long and how often should you do breathing exercises?

No study has found one ideal dose, but the trials described on this page give a realistic range. Most used a few minutes to twenty minutes a day, repeated over weeks rather than once:

A practical starting point, then, is five minutes a day with the timer above, at a fixed time such as after waking up or before bed, and a check after a few weeks whether it is doing anything for you. Consistency mattered more than length in the Stanford trial: the advantage of the physiological sigh grew over the five weeks rather than appearing all at once.

Is breathing practice safe for everyone?

Breathing exercises are generally safe for healthy adults practised as described on these pages. Stop and breathe normally if you feel dizzy or short of breath, which is common when starting and normally passes within a few breaths.

The Wim Hof method's fast-breathing and hold phases carry the clearest specific risk, fainting from lowered blood carbon dioxide, and should never be practised in or near water, while driving, or standing up quickly afterwards. Anyone pregnant, or with epilepsy, a heart condition, or high or low blood pressure, should talk to a doctor before making any breath-holding practice a regular habit.

Two groups need a plan from their own doctor rather than a page: people with COPD, asthma or another lung disease, for whom breathing exercises are part of rehabilitation, and people with diagnosed high blood pressure, for whom slow breathing is at most a small addition to treatment. For anyone, chest pain or breathlessness that does not settle is a reason to seek medical help, not to keep practising.