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The 4-7-8 Breathing Technique, Explained

4-7-8 breathing is a simple relaxation pattern popularized by Dr. Andrew Weil, adapted from older pranayama breathing practices. The whole method rests on one ratio: inhale for 4 counts, hold for 7, exhale for 8.

The pattern, step by step

1. Inhale quietly through your nose for 4 seconds.
2. Hold that breath for 7 seconds.
3. Exhale slowly and fully through your mouth for 8 seconds.

That's one cycle, lasting 19 seconds. Most people repeat it for a few minutes.

Why the exhale is the longest phase

A long, slow exhale is what most strongly activates your vagus nerve and parasympathetic ("rest and digest") response. Stretching the exhale well past the inhale is what separates 4-7-8 from ordinary breathing, and it's the main reason it can lower heart rate and support HRV within a few cycles.

A note on safety

The breath hold can feel unfamiliar at first. Go at your own pace, breathe normally if you feel light-headed, and avoid this exercise while driving or operating machinery.

Related: what is HRV?, HRV and sleep, how to measure HRV.