In for 4, hold for 4, out for 4, hold empty for 4. An even rhythm that steadies attention under pressure.
Box breathing, also called square breathing, divides each breath into four equal parts, like the sides of a square. Because every phase has the same length, it is easy to remember and easy to keep going when you are stressed. It is widely reported to be taught in US Navy training as a way to stay composed under pressure, and athletes, nurses and public speakers use it for the same reason.
Box breathing suits moments that call for a clear head rather than sleepiness: before a presentation, an exam, a match or a hard phone call. A few rounds between tasks can also mark a clean break in a busy day. If four seconds feels short, lengthen every side equally; if the empty hold feels uncomfortable, try triangle breathing, which leaves it out.
Equal-count breathing has a long history in yoga, where it is known as sama vritti. The name "box breathing" spread through military and first-responder training. Research on box breathing itself is limited. A 2023 Stanford study (Balban et al., Cell Reports Medicine) included it among the daily five-minute practices it compared; all of them were associated with better mood over a month, while an exhale-focused pattern, cyclic sighing, stood out most.
Practice sitting or lying down; never in water or while driving. Stop if you feel dizzy.
Holding with empty lungs can feel uneasy when you are anxious. Keep every hold soft, never force it, and shorten all four sides if you feel dizzy.