Extended-exhale breathing

Lengthen the exhale relative to the inhale to down-regulate the nervous system fast.

Why it works

A longer exhale increases parasympathetic (vagal) activity, slowing heart rate and raising heart-rate variability — a marker of calm and self-regulation. This is one of the few fast, reliable levers you have on autonomic arousal, usable discreetly in almost any situation.

How to do it

1. Inhale for a count of four, exhale slowly for six to eight.
2. Breathe through the nose into the belly, not the upper chest.
3. Continue for two to five minutes, keeping the exhale unforced.

Evidence

Slow-paced breathing (around six breaths per minute) reliably raises HRV and reduces self-reported stress and anxiety across multiple studies. (rct)

The effects are real but acute and modest; breathing regulates state in the moment rather than resolving the stressor behind it.

Common mistake

Forcing big, fast inhales, which can increase arousal or cause light-headedness; the lever is the slow, long exhale, not lung volume.