Let it out — your exasperation could have an upside.

There are lots of things that make us sigh — we’re exhausted, we’re irritated, we want to make a point without saying a thing.

And while the reasons may not be associated with positive feelings, new research shows the result could offer a bit of a health boost — and it’s not just emotional catharsis.

Sighing provides instant stress relief, helps keep lungs healthy and can even improve mood. Daniels C/peopleimages.com – stock.adobe.com

After letting out a sign, most people feel a sense of relief in their chest — a lightness or a relief.

And according to a new study published in the journal Science Advances this month, that’s not just mental: There are physical mechanisms at play.

Researchers found that deep breaths, particularl

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