How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing

Slow breathing's documented autonomic correlates

what the source states

A systematic review of slow-breathing studies in healthy humans found reproducible increases in respiratory sinus arrhythmia and heart-rate variability and related autonomic and central nervous system changes, consistent with a shift toward parasympathetic dominance.

what we infer

The breath is a real autonomic lever — the one voluntary handle on the system. This establishes the global shift only; the local, site-specific unlatching the featured hypothesis adds on top is exactly what has never been measured.

limitations

• Global cardiovascular indices in healthy subjects; no local tissue or tender-point measurements.