Slow-exhale breathing
4-second inhale, 6-second exhale. Activates parasympathetic recovery in 2 minutes.
Why
Long exhales activate the vagus nerve and shift autonomic balance toward parasympathetic dominance. The technique is shared by Stoic philosophy, pranayama, and modern resonance breathing protocols. Effects are immediate and accumulate with regular practice.
The technique
- 1
Sit upright, shoulders relaxed.
- 2
Inhale through the nose for 4 counts.
- 3
Exhale through pursed lips for 6 counts.
- 4
Continue for 2 minutes for an acute effect, 5-10 minutes daily for baseline tone.
When to use it
Pre-meeting nerves, post-conflict, sleep wind-down, or whenever the body feels keyed up.
Ideal for
In-the-moment stress regulation, pre-sleep wind-down, post-conflict recovery.
Markers this may influence
Evidence
Laborde 2022 Neurosci Biobehav Rev meta-analysis (223 studies) confirms voluntary slow breathing reliably raises vagally-mediated HRV both during and immediately after practice. Lehrer 2020 Front Neurosci synthesises the resonance-breathing literature: ~6 breaths/min consistently peaks HRV amplitude.