Your body already knows this one. You do it when you're about to fall asleep, and after a good cry: two quick breaths in, one long sigh out. Done on purpose, it's the quickest stress reset in this course.
What It Is
A physiological sigh is a full inhale through the nose, a second short 'top-up' inhale on top of it, and then a long, slow exhale through the mouth. The second inhale re-opens tiny collapsed air sacs in the lungs; the long exhale lets you breathe out more carbon dioxide and gives the nervous system a strong calming signal.
In a 2023 Stanford study comparing five minutes a day of different breathing practices with mindfulness meditation, 'cyclic sighing' — repeated physiological sighs — gave the biggest improvement in mood and the largest drop in breathing rate at rest. It's simple, but it's backed by evidence.
When To Use It
Use one to three sighs the moment you notice stress: before a hard conversation, after a tense email, in traffic, when you can't stop a worry loop. You don't need to close your eyes or sit in a particular way, which makes it easy to use anywhere.
For a deeper effect, do it for five minutes as a daily practice. That's what the study participants did, and it's what the pacer below runs.
Getting The Technique Right
The first inhale should be fairly full but not forced. The top-up is short — a little sniff that fills the last bit of space. The exhale is the important part: slow, through softly pursed lips or an open mouth, until you're comfortably empty. Let it be about twice as long as both inhales combined.
If you feel light-headed, slow down and make the breaths smaller. The goal is calm, not big.
The practice · 5 minutes
Five Minutes Of Cyclic Sighing
- 1Sit or stand comfortably. Let your shoulders drop.
- 2Start the pacer. Breathe in through the nose until fairly full.
- 3When it says 'Sip in a little more', take a short extra inhale through the nose.
- 4Breathe out slowly through the mouth until comfortably empty.
- 5Repeat for the full set. Keep it smooth and unforced.
- 6Afterwards, rate your stress from 1 to 10 and compare with how you felt before.
Coming back to it: For a week, use three sighs every time you pick up your phone after a stressful moment. You're training a reflex: stress → sigh.
Guided pacer
Physiological sigh
In 4s · out 7s · 25 rounds
Ready
Sit upright, shoulders soft, breathe through the nose.
Journal prompts
- “Where in my day would a quick sigh help most?”
- “What was my stress level before and after five minutes?”
- “Did the long exhale feel easy or did I want to rush it?”
Saved privately on this device. Come back tomorrow and log it again.
Check Your Understanding
3 quick questions. Retake it any time.
1. What is a physiological sigh?
2. What did the 2023 Stanford study find about cyclic sighing?
3. If you feel light-headed during the sigh, what should you do?
Keep Practising With Our Free Apps
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Breathwork Timer
A full-screen guided breathing timer with preset patterns. Keep it open for your daily practice.
Open the timer →
Meditation Timer
A calm timer with gentle bells for sitting after your breathwork.
Start a sit →
Chakra Alignment
Breathe and tune into each of the seven chakras with sound and colour.
Try it →Safety: Breathwork is generally safe, but stop if you feel dizzy, tingly or anxious and return to normal breathing. Never practise breath holds or energising breath while driving, in water, or standing where you could fall. If you are pregnant, or have a heart condition, high blood pressure, epilepsy, panic disorder or a respiratory condition, skip Lesson 7 and the breath holds and check with your doctor first. This course is education, not medical treatment.