Before I studied functional breathing, I assumed sighing meant I was stressed or that I was “releasing” stress. A psychologist colleague said the same thing to me recently: “I sigh a lot to regulate.”

It’s a common belief. But it’s only part of the picture.

A sigh is essentially a large breath in followed by a long exhale.

𝗣𝗵𝘆𝘀𝗶𝗼𝗹𝗼𝗴𝗶𝗰𝗮𝗹𝗹𝘆, 𝗶𝘁 can be 𝗮 𝗳𝗼𝗿𝗺 𝗼𝗳 𝗼𝘃𝗲𝗿–𝗯𝗿𝗲𝗮𝘁𝗵𝗶𝗻𝗴.

When we sigh frequently (and sometimes when we yawn frequently), we’re often compensating for subtle chronic over-breathing — breathing a little too fast or too deeply for our actual metabolic needs.

The issue is that repeated sighing can keep CO₂ lower than is optimal, which the nervous system can experience as a stress signal.

So while sighing can feel relieving in the moment, it can quietly maintain the very stress state we’re trying to exit.

Real regulation isn’t about occasional big releases.
It’s about maintaining slower, lighter, quieter breathing through challenge, so the nervous system doesn’t need to keep compensating.

Breathing science is simply another piece of the nervous system puzzle.

Calm isn’t something you sigh your way into.
It’s something your breathing pattern teaches your nervous system over time.

Try this: For a day, simply notice when you sigh. What were you doing just before it happened, and how has the day been so far? Were you concentrating, rushing, holding your breath or feeling that you needed a bigger breath?

Notice how you are breathing now. Is there movement around your lower ribs and belly, or are you mainly breathing high in your chest? If it feels comfortable, let your next few breaths be easy and unforced, allowing your lower ribs and belly to move naturally.

Noticing a pattern can help you build new habits.

Read more about Functional Breathing and How it Shapes Stress and Resilience