4 seconds in · 4 hold · 4 out · 4 hold.
A simple breathing practice that may help you feel calmer.
8 complete cycles · 2m 8s
The Science
What breathing research suggests.
Square breathing — or box breathing — is a four-phase technique: breathe in, hold, breathe out, hold, for equal lengths of time. Four seconds per phase is one starting point. Keep the pace comfortable rather than forcing or straining your breath.
Research into slow, controlled breathing suggests it can influence autonomic activity and may help reduce stress or anxiety. Studies use different techniques, timings and populations, so their results do not all apply directly to this exercise.
Two minutes is a convenient starting point, not a proven minimum or a guaranteed result. Research often studies longer sessions and repeated practice. This tool is for general wellbeing, not treatment; stop if you feel dizzy or uncomfortable.
5 minutes
Daily practice studied
A randomised study compared three five-minute daily breathing exercises with meditation over one month. The strongest results favoured exhale-focused cyclic sighing, not box breathing specifically.
Balban et al., Cell Reports Medicine, 2023
Practice
No instant-result promise
A review associated effective breathing programmes with repeated practice and guidance. It does not establish a guaranteed benefit from a two-minute session.
Bentley et al., Brain Sciences, 2023
58 studies
Promising, not universal
A systematic review included 58 studies covering 72 breathing interventions. Fifty-four interventions reported reduced stress or anxiety; not all interventions were effective.
Bentley et al., Brain Sciences, 2023
Research & References
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