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Box Breathing

calm your nervous system and refocus in four counts

Written by the Squiggle editorial team · Last updated 22 May 2026 · ~4 min read

Box breathing (also called square breathing or four-square breathing) is one of the simplest ways to settle a racing mind and come back to the task in front of you. The whole idea is symmetry: you breathe in, hold, breathe out, and hold again — each for the same count — like tracing the four sides of a box.

How to do box breathing

1. Sit comfortably and breathe all the way out.
2. Inhale through your nose for a count of 4.
3. Hold for a count of 4.
4. Exhale through your mouth for a count of 4.
5. Hold for a count of 4.
6. Repeat for about four rounds, or until you feel steadier.

If a four-count hold feels like too much, drop to three. The exact number matters less than keeping the four phases even and unhurried.

Why it works

Slow, even breathing — especially a deliberate, controlled exhale — gently shifts your body away from the "fight or flight" stress response and toward the "rest and digest" state. The counted holds give your mind a simple, repetitive thing to track, which crowds out the spiral of thoughts that pulls your attention away. The result is usually a calmer body and a clearer head within a minute or two.

Who popularised it

Paced breathing is ancient, but the "box" framing became widely known through high-stress professions — it's frequently attributed to US Navy SEAL training as a way to stay composed under pressure, and was popularised by former SEAL Mark Divine. Today it's a fixture in therapy, meditation apps, and performance coaching for the same reason: it's quick, discreet, and needs nothing but your breath.

When to use it

• Before a focus session, to clear the runway.
• In the wobble between tasks, when your attention is scattered.
• Before something stressful — a call, a deadline, a hard conversation.
• Any time you notice shallow, fast breathing.

Common mistakes

Forcing huge breaths (gentle is better), rushing the counts, or straining on the holds. If you ever feel lightheaded, return to normal breathing — this should feel calming, never uncomfortable.

Related

Pair it with nootropics for focus if you're curious about the supplement side, or try the rest of our focus & attention techniques. You can run box breathing before any timer in the Squiggle app.