4-7-8 Breathing App
The Relaxing Breath
Dr. Andrew Weil's famous technique for sleep, anxiety, and instant calm. Guided timer with haptic feedback on your smartwatch.
Comparing options for anxiety? See best breathing apps for anxiety relief.
What is 4-7-8 breathing?
4-7-8 breathing is a relaxation pattern popularised by Dr Andrew Weil: inhale quietly through the nose for four seconds, hold for seven, then exhale through the mouth for eight. The long hold and an exhale twice the length of the inhale stretch each breath to 19 seconds, about three breaths a minute.
It is one of several exhale-led patterns. If the seven-second hold is uncomfortable, extended exhale breathing keeps the long out-breath with only short pauses, and Cyclic Sighing drops the holds altogether.
What are the benefits of 4-7-8 breathing?
Direct evidence for 4-7-8 is limited but positive. In healthy young adults, three short sets of 4-7-8 breathing lowered heart rate and systolic blood pressure straight away and, in those who had slept normally, shifted heart rate variability toward parasympathetic activity. Its long exhale matches what exhale-ratio studies link to relaxation.
Lower heart rate and blood pressure right after
In 43 healthy adults aged 19 to 25, three sets of six 4-7-8 cycles lowered heart rate and systolic blood pressure, whether or not they were sleep deprived. In the group that had slept normally, high-frequency HRV rose. [1]
A long exhale supports relaxation
Breathing with an exhale longer than the inhale increased self-reported relaxation, and at slow rates raised high-frequency heart rate variability, compared with the reverse ratio. [2]
Slow breathing raises HRV
A meta-analysis found voluntary slow breathing increases vagally mediated heart rate variability during and after practice. 4-7-8 runs at about three breaths a minute. [3]
Why People Use 4-7-8 Breathing
Fall Asleep Faster
The extended exhale activates your parasympathetic nervous system, preparing your body for sleep.
Reduce Anxiety
Slows racing thoughts and calms the mind by activating the relaxation response.
Lower Heart Rate
The breath hold and long exhale naturally slow your heart rate and reduce blood pressure.
Quick Results
Feel calmer in just 4 breath cycles, under 2 minutes for noticeable relaxation.
How do you do 4-7-8 breathing?
Exhale fully through the mouth, then close it and inhale quietly through the nose for a count of four. Hold the breath for seven. Exhale through the mouth for eight with a soft whoosh. That is one breath. Start with four breaths; the ratio matters more than the exact counts, so speed them up if the hold feels strained.
Get Comfortable
Sit or lie down in a comfortable position. Place the tip of your tongue against the ridge behind your upper front teeth.
Exhale Completely
Exhale completely through your mouth, making a whoosh sound.
Inhale for 4 Seconds
Close your mouth and inhale quietly through your nose for 4 seconds.
Hold for 7 Seconds
Hold your breath for 7 seconds.
Exhale for 8 Seconds
Exhale completely through your mouth, making a whoosh sound, for 8 seconds.
Repeat
Repeat the cycle 3 more times for a total of 4 breath cycles.
Why Use Vayu for 4-7-8 Breathing?
Feel gentle taps on your Apple Watch or Wear OS watch for each phase
Vayu reads the HRV your watch recorded after each session and uses it to shape the next one
Start with 4 cycles and work your way up as you become more comfortable
Track your daily practice and see improvements over time
Who should not do 4-7-8 breathing?
4-7-8 is slow, but the seven-second hold is a real breath hold. With uncontrolled high blood pressure, heart disease, pregnancy or a lung condition, shorten the hold or skip it, or choose Extended Exhale instead. Some people feel light-headed in the first few breaths; if so, speed up the counts and keep the ratio.
- Uncontrolled high blood pressure, heart disease or a history of stroke: shorten or skip the 7-second hold
- Pregnancy: avoid straining holds; confirm with your provider
- Lung disease: follow your respiratory team's advice on breath holding
- Panic disorder: if the hold triggers air hunger, use an exhale-led pattern with no long hold
Never practise breath holds in or near water or while driving.
Read the full breathwork safety guidelines and the guide to breathwork contraindications. This is general education, not medical advice.
How does Vayu guide 4-7-8 breathing on the wrist?
Each four-second inhale is a ramp of taps that starts fast and slows. The seven-second hold clicks once a second, so you feel the count without looking. The eight-second exhale is a ramp from slow to fast, and a short silence follows before the next breath. The whole session runs on Apple Watch or Wear OS.
Seven clicks, no counting
The hardest part of 4-7-8 is counting the hold with your eyes shut. Seven soft clicks do it for you.
Two to eight minutes
4-7-8 runs for 2, 4, 6 or 8 minutes on the watch, with 2 as the default, which suits a bedtime wind-down.
No screen at night
Because the guide is haptic, you can practise in the dark without lighting up a phone.
HRV after, not during
When the session ends, Vayu reads the HRV (SDNN) your watch recorded and uses it to shape the next session. It does not measure HRV while you breathe.
How every phase feels on the wrist, and why HRV is read after the session rather than during it, is explained on the haptic breathing page.
Frequently Asked Questions
What is 4-7-8 breathing?
4-7-8 breathing is a relaxation technique developed by Dr. Andrew Weil. You inhale for 4 seconds, hold for 7 seconds, and exhale for 8 seconds. It activates the parasympathetic nervous system to reduce stress and promote sleep.
Does 4-7-8 breathing work for sleep?
Yes, 4-7-8 breathing is highly effective for sleep. The extended exhale activates your parasympathetic nervous system, slowing heart rate and preparing your body for rest.
How many times should I do 4-7-8 breathing?
Start with 4 breath cycles when beginning. As you become comfortable, you can increase to 8 cycles. Dr. Weil recommends practicing twice daily for best results.
Is there a free 4-7-8 breathing app?
Vayu offers a 7-day free trial with guided 4-7-8 breathing and haptic guidance on Apple Watch and Wear OS. After each session it reads the HRV your watch recorded and uses it to shape the next one. After the trial, it costs $59.99/year.
More Breathing Techniques
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Other breathing techniques
One page per technique. The full list with patterns is on the pranayama and breathing techniques hub.
- Box breathing (4-4-4-4)Four equal phases of four seconds: inhale, hold, exhale, hold. A steady, structured reset for focus under pressure.
- Cyclic Sighing (3-1-6)Two inhales through the nose, then one long exhale through the mouth, repeated for about five minutes. Vayu paces it 3-1-6.
- Extended Exhale (3-2-6-2)An exhale twice as long as the inhale, with short pauses. Vayu paces it 3-2-6-2 for calm without long holds.
- Coherent breathing (5 to 6 breaths per minute)Slow, even breathing at about 5 to 6 breaths a minute, the range where heart rate variability responds most.
- Anulom Vilom (4-2-6-2)Breathing through one nostril at a time, alternating sides. Vayu paces it 4-2-6-2, or 2-1-3-1 on the fast setting.
- Bhastrika (4-2-4-2)Full, forceful breaths in and out through the nose. Vayu paces it as deliberate rounds, 4-2-4-2 by default.
- Kapalbhati (60 exhales per minute (normal speed))Short, sharp exhales driven by the belly, with passive inhales between them. Vayu paces one exhale per second by default.
Sources
- Vierra et al. 2022, Physiological Reports: effects of sleep deprivation and 4-7-8 breathing control on heart rate variability, blood pressure, blood glucose and endothelial function. After three sets of 4-7-8 breathing, heart rate and systolic blood pressure fell in 43 healthy young adults
- Van Diest et al. 2014, Applied Psychophysiology and Biofeedback: inhalation/exhalation ratio modulates the effect of slow breathing on heart rate variability and relaxation. A longer exhale than inhale raised self-reported relaxation, and at 6 breaths a minute raised high-frequency HRV
- Laborde et al. 2022, Neuroscience and Biobehavioral Reviews: effects of voluntary slow breathing on heart rate and heart rate variability, a systematic review and meta-analysis. Voluntary slow breathing raised vagally mediated HRV during the session, straight after it, and after multi-session programmes
