How to use the physiological sigh before a hard meeting
The physiological sigh is two inhales through the nose, the second a short top-up, followed by a long, slow exhale through the mouth. Repeating it for about a minute lowers physiological arousal, largely because the extended exhale slows heart rate. It's one of the fastest ways to take the edge off before a high-stakes conversation.
How to do it
- Inhale through your nose.
- Without exhaling, take a second, shorter inhale through the nose to fill the lungs fully.
- Exhale slowly through your mouth, longer than the two inhales combined.
- Repeat two or three times, or for about a minute, then breathe normally.
The exhale is the part that matters most. Let it be unhurried, without forcing the air out.
Why it works
Two mechanisms are usually cited. The double inhale re-expands small air sacs in the lungs that partly collapse during shallow, stressed breathing, which makes the next exhale more effective at clearing carbon dioxide. And the long exhale engages the vagal brake on the heart: heart rate naturally slows during exhalation, so lengthening the exhale tilts the balance toward calm.
A 2023 study from Stanford, published in Cell Reports Medicine, compared five minutes a day of cyclic sighing with other breathing practices and mindfulness meditation over a month. The sighing group showed the largest improvement in positive mood and a reduction in resting breathing rate. One study is not the last word, but the mechanism is well understood and the cost of trying it is close to zero.
When to use it
- In the two minutes before a hard call or meeting.
- When you notice you’ve re-read the same email three times.
- After a difficult conversation, before you reply to anything.
What it won’t do
It shifts state. It doesn’t resolve the reason for the stress. If the meeting is hard because the decision is unclear, sigh first and then get clear on the decision. Calm and clarity are different problems, and you usually need the first to work on the second.
Questions
How many sighs should I do?
Start with two or three, or about a minute. In the research, people practiced for five minutes a day, but before a meeting a minute is usually enough to notice a change.
Can I do it in the meeting itself?
Yes, quietly. Breathe in through the nose, a small second sip, and let the exhale run long through slightly parted lips. Nobody needs to notice.
Is it safe for everyone?
For most people, yes. If you have a respiratory or heart condition, or feel lightheaded, slow down, breathe normally and check with your doctor before practicing regularly.