Box breathing (Sama Vritti): the 4-4-4-4 breathing technique

How to do Sama Vritti

1. Sit upright on a chair or the floor, or lie on your back. Relax your shoulders and rest your hands on your thighs or belly.
2. Breathe out fully through your nose to start with empty lungs.
3. Breathe in through your nose for 4 seconds while the ring grows. Let the belly and lower ribs expand.
4. Hold the breath in for 4 seconds. Keep the throat and shoulders soft — pause the breath, do not lock it.
5. Breathe out through your nose (or softly through the mouth) for 4 seconds while the ring shrinks.
6. Hold the breath out for 4 seconds, relaxed, before the next inhale.
7. Repeat for 8 rounds, about 2 minutes. When you finish, breathe normally for a few breaths before you open your eyes.

Box breathing is a simple technique in which you breathe in, hold, breathe out and hold again, each for the same count, usually four seconds. Picture tracing the four sides of a square, one side per step. In yoga, box breathing is called Sama Vritti. This page explains what it is, how to use the timer above, how long to practise, what the research says and how it compares with 4-7-8 breathing.

What is box breathing (Sama Vritti)?

The box breathing meaning is in the shape: four equal sides, four equal steps. That is why it is called box breathing, or square breathing. The yoga name is Sanskrit: sama means "equal" and vritti means "movement" or "fluctuation", so Sama Vritti is "equal breath". In classical pranayama it often means an equal inhale and exhale; the version with equal holds on both sides is the square.

A simple definition: what is box breathing 4-4-4-4? In through the nose for 4, hold for 4, out for 4, hold for 4, repeated for a few minutes. Is box breathing new age? No. It is plain, counted breathing with roots in yoga's pranayama, later made famous by US Navy SEALs.

Who uses box breathing, and why do Navy SEALs use it?

Military trainers, police, athletes, nurses, surgeons and therapists all teach box-style breathing. Navy SEALs and other military units use it because it works under pressure: counting to four gives the mind one job, and the slow rhythm settles the body before a hard task. The same logic helps adults, teens and children before an exam, an interview or a difficult conversation.

How to use the box breathing timer online

The timer above is already set to 4-4-4-4 for 8 rounds. Press Start and follow these box breathing instructions:

1. "Breathe in" — the ring grows for 4 seconds.
2. "Hold" — the ring stays large for 4 seconds.
3. "Breathe out" — the ring shrinks for 4 seconds.
4. "Hold" — the ring stays small for 4 seconds.

Those are the four steps of box breathing. A soft chime marks each change, so you can close your eyes. Change the rounds in the box (8 rounds takes about 2 minutes; 19 rounds is about 5), or switch the voice off. Your practice is saved on your device in My Practice.

Box breathing for beginners: counts and tips

• Box breathing: nose or mouth? Breathe in through the nose. Breathing out through the nose or softly through pursed lips are both fine.
• Soft holds. A hold is a pause, not a squeeze. If your throat locks or you gasp afterwards, the holds are too long for now.
• Lying down works well at night; sitting up is better when you need to stay alert.

How long should I do box breathing, and when?

Two to five minutes is enough for most people. You can use the box pattern of breathing one to three times a day: as daily practice in the morning, before a stressful event, and in bed. For anxiety, the best time to do it is at the first sign of rising tension rather than at the peak of a panic attack.

Why box breathing works: benefits and research

Does box breathing really work? For calming down, yes, for most people. Slow breathing with pauses lowers the breathing rate to about four breaths a minute. Research on slow breathing in general shows it can raise heart-rate variability, a sign that the calming "rest and digest" side of the nervous system is more active. That is how it can reduce stress.

The best direct study is a 2023 trial from Stanford. Healthy adults did five minutes a day, for a month, of either box breathing, an exhale-focused "cyclic sighing" breath, fast breathing or mindfulness meditation. The breathing and meditation groups all reported better mood and less anxiety; cyclic sighing, which has a long exhale, was slightly ahead. So the scientific and health benefits of box breathing are real but modest.

• Anxiety and panic. Box breathing exercises for anxiety and stress relief give you something to do with your attention. See our yoga for anxiety and stress relief plans.
• Sleep and relaxation. As a bedtime relaxation technique, box breathing can quieten a racing mind; pair it with the yoga for sleep routine or Yoga Nidra.
• Mental health. Box breathing for mental health can support treatment for depression, but it is not a replacement for therapy or medicine.
• Weight loss. There are no real box breathing benefits for weight loss; any link is indirect, through less stress-eating.

Box breathing vs 4-7-8 and meditation

Box breathing uses equal counts; 4-7-8 breathing has a longer hold and an exhale twice as long as the inhale, which makes it more sedating. Use the square for focus during the day and 4-7-8 at night. Compared with meditation, the box method of breathing is more structured: is it a mindfulness technique? Partly — you pay attention to the breath, but you also control it. Many people use a few rounds as a doorway into silent meditation with the meditation timer.

If the holds do not suit you, try Ujjayi or Anulom Vilom, which have no holds, or the whole list on the pranayama page.

Common mistakes

• Straining on the holds. The most common reason it feels bad. Shorten them.
• Big, fast inhales. Fill the lungs gently over the whole four seconds.
• Raised shoulders. Breathe into the belly and lower ribs.
• Using box breathing in labor or pregnancy with long holds. Keep an even 4 in and 4 out and skip the holds.

Where this practice is used

Chakras: Muladhara (Root Chakra)

Yoga for: Knee Replacement Recovery · Sciatica · Posture and Tech Neck · Desk Workers and Sitting All Day · Hip Replacement Recovery · Slip Disc (Herniated Disc) · Spinal Stenosis · Spondylolisthesis · Flat Feet · Fibromyalgia · Jaw Pain (TMJ) · Anxiety · Stress Relief · Exam Stress

More breathing techniques

Breathing practices are safe for most people when done gently. Stop if you feel dizzy, anxious or short of breath, and ask your doctor first if you have heart or lung disease, high blood pressure, epilepsy or are pregnant.