Why a longer exhale calms you
When you exhale for longer than you inhale, the parasympathetic branch of the vagus nerve takes over. Heart rate slows on the out-breath (respiratory sinus arrhythmia), cortisol output drops, and the muscles around the jaw and shoulders soften within 60–90 seconds.
The 4-7-8 protocol
Inhale through the nose for 4 seconds. Hold for 7 seconds. Exhale through pursed lips for 8 seconds. Repeat four cycles. If 7 seconds of breath-hold feels too long at first, scale to 4-6-8 or 4-4-6 — keep the exhale longest.
What you should feel each minute
Minute 1: mild light-headedness as CO₂ rebalances. Minute 2: shoulders drop, jaw unclenches, thoughts slow. Minute 3: a clearer headspace and steadier heartbeat. If light-headedness intensifies, return to natural breathing.
When to use it
Before a difficult conversation, while waiting in a queue, on the train, or in the bathroom at work. It is discreet — no one will notice. Build the habit by tying it to an existing cue: every red light, every lift ride, every coffee.
Log your sessions in Breathe On and explore the matching guidance at [/breathing-for/anxiety](/breathing-for/anxiety).