Diaphragmatic breathing is a slow, deep breathing technique that prioritizes the diaphragm — the main muscle of respiration — over shallow chest breathing. By exhaling more slowly than inhaling, the vagus nerve is activated, reducing heart rate and the stress response. It is the physiological basis of techniques such as 4-7-8, coherent breathing, and box breathing.
Concept origin
The technique has roots in pranayama practices (yoga) and was incorporated into modern clinical psychology through Marsha Linehan's dialectical behavior therapy (1993). Its effect on vagal tone has been documented in contemporary affective neuroscience, with studies showing measurable increases in heart rate variability after a single practice session.
How it manifests
- ▸ Shallow, rapid chest breathing that keeps the nervous system activated
- ▸ A sense of "air hunger" during anxiety despite constant breathing
- ▸ Chronic tension in shoulders, neck, and jaw from overuse of accessory muscles
Therapeutic approach
Steps: 1) Lying on your back or seated with a straight spine. 2) One hand on the chest, one on the abdomen. 3) Inhale through the nose for a count of 4, feeling the abdomen expand (the chest hand should stay still). 4) Exhale through the mouth for a count of 6-8, feeling the abdomen fall. 5) Repeat for 6-10 cycles. The key is that the exhale is visibly longer than the inhale. With practice, the body learns to activate this pattern automatically under stress.
Related concepts
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