4-7-8呼吸 助眠 放松呼吸 入睡 | 4-7-8 breathing sleep relaxation technique
4-7-8 Breathing
Follow the circle: inhale 4 seconds, hold 7, exhale 8. A few rounds help calm your body for sleep.
Get comfortable, rest the tip of your tongue behind your upper front teeth, and breathe quietly through your nose — except the long exhale, which goes through your mouth. If holding your breath feels uncomfortable, shorten the counts but keep the 4 : 7 : 8 ratio.
Why 4-7-8 works
The 4-7-8 pattern was popularized by Dr. Andrew Weil, based on pranayama (yogic breath control). Slow breathing with a long exhale shifts your autonomic balance toward the parasympathetic "rest and digest" system: heart rate slows, blood pressure drops, and muscle tension eases. A review of studies on slow breathing found consistent effects on heart-rate variability and self-reported relaxation (Zaccaro 2018, Front Hum Neurosci). The long 8-second exhale is the key — it typically slows the heart slightly with every round.
📖 Related reading: How to Fall Asleep Faster · Sleep Anxiety: How to Calm a Racing Mind
Frequently asked questions
How many rounds should I do?
Dr. Weil recommends starting with 4 cycles, twice a day. Doing it daily for 6–8 weeks makes the relaxation response easier to trigger when you actually need it at night.
Can 4-7-8 breathing really put me to sleep?
It is not a sedative — it lowers physiological arousal, which removes one of the main obstacles to falling asleep. Many people find they drift off during or after the exercise, especially combined with a cool, dark bedroom and no screens.
I feel dizzy or uncomfortable holding my breath. What should I do?
Shorten all counts but keep the ratio, for example 2-3.5-4. The ratio matters more than the absolute seconds. If you have respiratory or cardiovascular conditions, check with your doctor first.
Disclaimer: This tool is for general informational purposes only and is not medical advice. If you have chronic sleep problems, please consult a healthcare professional.