06/18/2026
The research on slow, nasal, diaphragmatic breathing is piling up.
A 2025 narrative review of the A52 Breath Method examined the science behind slow nasal diaphragmatic breathing and concluded that this style of breathing significantly improves vagal tone, HRV, parasympathetic activity, and emotional control, while reducing cortisol, anxiety, stress, and PTSD symptoms.
That is one breathing pattern.
Doing those specific things.
Measured across multiple outcomes.
For first responders, that list reads like a wish list for career longevity. Lower cortisol. Better HRV. More emotional control. Reduced PTSD symptoms.
None of this requires a significant time investment. It requires a consistent practice.
That is what we build at breathworktactics.com.
(A52 Breath Method: A Narrative Review of Breathwork. PMC12341363. 2025)