Box Breathing Protocol
A steady four-sided rhythm to hold you together.
Duration
5 min
Level
01
Evidence
Why this protocol
Symmetric breathing with equal holds balances sympathetic and parasympathetic tone. The retention phases gently raise CO₂ tolerance, reducing baseline reactivity of the stress response.
Perfect moments
What you'll experience
Composed alertness
Even heart rate
Steady mind
Quiet body
Coach's insight
“The holds are the medicine. Don't skip them — they're where CO₂ tolerance is trained.”
Common mistakes
Skipping the holds because they feel awkward.
Choosing a count that feels effortful — start at three seconds if five is strained.
Bracing the shoulders during the retention phases.
Breathing pattern
Session length
Symmetric breathing with equal holds balances sympathetic and parasympathetic tone. The retention phases gently raise CO₂ tolerance, reducing baseline reactivity of the stress response.
Evidence
Used in military and first-responder training programmes; controlled trials show improvements in attentional control, cortisol response and perceived stress.
Onset
2–3 minutes
Lasts
45–90 minutes
Related protocols
After this session
You'll gently reflect on: