The physiological sigh: what it is and how to do it
The physiological sigh is a short technique of two quick in-breaths followed by one long out-breath: count 2 in, 1 more in, 6 out. In Shore this exercise is called A Sigh of Relief; it is short and easy, so it works like a small pause.
The technique is adapted from the body's natural sighing reflex; its scientific name is the physiological sigh, and it has been studied at Stanford University.
This guide explains the steps, how it looks in Shore and where it comes from. There is no breath hold in it: only two short in-breaths and one long out-breath.
Step by step
Settle somewhere comfortable and let your shoulders drop. Let Shore's counter keep the count. Go through the three phases in order: two short in-breaths, then one long out-breath.
- Breathe in through your nose: count 2
- Breathe in through your nose (…a little more): count 1
- Slowly out through your mouth: count 6
Rhythm: 2+1 in · 6 out
In Shore you choose 1, 3, 5 or 10 minutes, and you can stop whenever you like. The exercise is designed to be short and easy; a few rounds are enough.
What you'll see in Shore
On screen you see a dandelion. With the two short in-breaths the light grows; as you breathe out long, seeds drift off in the wind and some fall to the ground and sprout. With the last breath the remaining seeds fly together and the sprouts glow.
The moving picture above shows how the exercise looks in Shore.
How does it help?
Two short inhales reopen the tiny air sacs in your lungs. During the long exhale that follows, your heart naturally slows a little, and a long breath out gives that slowing more time.
Small tips
Think of the second in-breath as a small addition on top of the first: “a little more”. Shore reminds you of it with a short cue on screen; there is no need to force it.
Keep the long out-breath slow and soft right to the end of the count. Blowing on a dandelion is a long exhale too; on screen, with every long out-breath a few seeds join the wind.
Because it is short, you can do it as a small pause in the day. Unlike box breathing or 4-7-8, it has no breath hold.
The screen stays awake during the exercise. Sound is off by default; the dandelion's movement shows the rhythm quietly too.
Questions people ask
What is the physiological sigh?
A breathing technique adapted from the body's natural sighing reflex: two short in-breaths, then one long out-breath. In Shore it is called A Sigh of Relief.
Do I have to breathe in twice?
That is how the rhythm is set in Shore: the first in-breath lasts 2 counts, the second 1 count, then 6 counts out. Don't force your breath; if you feel dizzy or short of breath, stop and breathe normally.
How many times should I do it?
We don't give a set number. In Shore you choose 1, 3, 5 or 10 minutes; keep going as long as it feels comfortable and stop whenever you like.
Do I need an account for Shore?
No. It opens in your browser, with no account and no ads, and once you have opened it, it works offline too.
Safety
Don't force your breath; if you feel dizzy or short of breath, stop and breathe normally.
Research and sources
Where does it come from?
Adapted from the body's natural sighing reflex; its scientific name is the "physiological sigh". Studied at Stanford University.
Sources
- Balban MY, … Spiegel D, Huberman AD. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine, 2023.
pmc.ncbi.nlm.nih.gov/articles/PMC9873947/
Updated: 13 November 2026