De-stress · Brain health technique
Slow / Deep Breathing
Evidence grade: Essential
Intentional breathing practices, such as diaphragmatic breathing, box breathing, or 4-7-8 technique, that slow respiration to around 4–6 breaths per minute, stimulating relaxation responses.
- Practice
- De-stress
- Principle
- Restoration
- Tactic
- Core Regulation Practices
- Evidence grade
- Essential
- Strength of evidence
- High
- Effort
- Medium
- Time commitment
- Low
How to practice Slow / Deep Breathing
Practice 5–10 minutes daily or during acute stress. Focus on slow nasal inhalation, relaxed exhalation twice as long as the inhale, and gentle diaphragmatic expansion. Can be done seated, lying down, or before sleep. Regular short sessions are more effective than occasional long ones.
The evidence behind Slow / Deep Breathing
Slow breathing activates the vagus nerve and increases heart rate variability (HRV), a key marker of stress resilience and parasympathetic balance. Controlled trials show reduced anxiety, blood pressure, and cortisol, and improved sleep and emotional regulation. Mechanistically, slow exhalation enhances baroreceptor feedback and prefrontal control of limbic stress circuits. Evidence is robust and low-risk across populations.
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