4-7-8 breathing: free guided timer (Dr. Weil method)

What is 4-7-8 breathing?

4-7-8 breathing is a conscious breathing technique where each cycle breaks down into three phases: 4 seconds of inhaling through the nose, 7 seconds of holding with full lungs, then 8 seconds of exhaling slowly through the mouth. The 2:1 exhale/inhale ratio activates the parasympathetic nervous system and quickly calms body and mind.

Origins: Dr. Andrew Weil and pranayama

Developed by Dr. Andrew Weil, an American Harvard-trained physician and pioneer of integrative medicine, 4-7-8 draws directly on pranayama, the breathing art of Indian yoga. Dr. Weil describes it as "a natural tranquilizer for the nervous system" and has recommended it to his patients since the 1990s to manage anxiety, insomnia and compulsive urges.

How does it work?

Three physiological mechanisms make 4-7-8 so effective:

• Vagus nerve stimulation: the slow exhale activates the parasympathetic branch of the autonomic nervous system, the "rest and digest" one.
• Slowing the heart rate: a full cycle lasts 19 seconds, about 3 breaths per minute — well below the heart coherence threshold.
• Regulating blood CO₂: the hold slightly raises CO₂, which promotes vasodilation and tissue oxygenation.

When to use 4-7-8?

This technique excels in three situations:

• Before sleep: practiced lying down, it speeds up falling asleep in 1 to 3 minutes.
• During an anxiety attack: it cuts short hyperventilation and the feeling of panic.
• Before a stressful event: interview, exam, public speaking — a few cycles are enough to calm the nervous system.

How to practice it well?

1. Settle in sitting with a straight back, or lying down if it's for sleep.
2. Place the tip of your tongue against the roof of your mouth, just behind your upper front teeth (keep this position throughout the exercise).
3. Empty your lungs through your mouth by exhaling gently.
4. Inhale for 4 seconds through the nose, calmly.
5. Hold for 7 seconds with full lungs, without tensing.
6. Exhale for 8 seconds through the mouth, lips slightly pursed, making a soft "whoosh".

The soft sound of the exhale is intentional: it helps you lengthen and steady your breath.

How many cycles should you do?

Dr. Weil recommends starting with 4 cycles (about 1 min 15 s) and not exceeding 8 cycles during the first month. Beyond that, some people feel lightheaded due to the temporary shift in blood gases. After 4 to 6 weeks of daily practice, you can go up to 8 cycles twice a day.

Contraindications and precautions

4-7-8 is safe for the vast majority of people, but seek medical advice before practicing if:

• You have severe asthma or COPD (the hold may be uncomfortable)
• You are pregnant (long holds are generally not advised)
• You have uncontrolled high blood pressure or a history of heart issues
• You feel dizzy: sit down and return to normal breathing.

This tool is in no way a substitute for medical or psychological advice. If symptoms persist, consult a healthcare professional.

4-7-8, heart coherence or box breathing: which to choose?

All three techniques work on the autonomic nervous system, but with different intentions:

• 4-7-8: sedative, ideal for falling asleep or defusing an anxiety attack. Short practice (2-4 min).
• Heart coherence (5-5): regulating, ideal for balancing your day. Foundational practice (5 min, 3 times/day).
• Box breathing (4-4-4-4): centering, ideal to focus before a demanding task. Short practice (3-5 min).

If you're looking to fall asleep faster or calm a surge of anxiety, 4-7-8 is the best choice.