The 4-7-8 technique was developed by Dr. Andrew Weil inspired by yogic pranayama. The ratio — inhale 4 seconds hold 7 exhale 8 — expels more CO₂ than you take in progressively slowing heart rate.
What does research say?
Research shows it reduces cognitive arousal before sleep and activates the vagus nerve. Five proven benefits: improved sleep reduced stress and anxiety lower heart rate better emotional regulation improved focus.
How to practice
Sit comfortably close your eyes. Inhale through nose for 4 seconds. Hold for 7 seconds. Exhale completely through mouth for 8 seconds with a soft "whoosh" sound. Start with 3-4 cycles increase to 8 over time.
Ideal before sleep during sudden anxiety or before stressful events. After two weeks of daily practice most people report significantly improved sleep quality. Do not practice while driving.