A Nervous System First Methodology
Regulation as a Trained Skill
This white paper sets out a methodology that treats autonomic regulation as the primary training target in human performance work, with voluntary slow breathing as the most accessible input to it. The argument is structural rather than symptomatic: sleep quality, attentional stability, pain sensitivity and recovery capacity each have their own literature, and interventions aimed at each in isolation address outputs rather than the regulatory state they share. The paper sets out a practice model built on one respiratory input directed toward three aims, reset after a demand, recovery toward rest, and deliberate activation before demand, distributed across a working day as brief repeated practice attached to existing daily cues. Evidence is reported with its actual strength. A systematic review and meta-analysis of 223 studies found vagally mediated heart rate variability increased during slow breathing, after a single session, and following multi-session training. Resonance breathing near six breaths per minute has a well-described baroreflex mechanism, though its originating authors concede the controlled clinical evidence is limited. The paper also corrects two claims commonly made in this field, including in the author's own prior work: heart rate variability driven by paced breathing is not a measure of vagal tone, and there is no evidence that brief frequent practice produces greater physiological adaptation than longer infrequent practice. The defensible case for brief daily practice is that no study has shown longer or less frequent sessions to do better, and that brief practice fits more easily into a working day; whether it is also easier to sustain has not been shown.
Keywords: Autonomic Regulation, Slow Breathing, Resonance Frequency Breathing, Heart Rate Variability, Respiratory Heart Rate Variability, Practice Dose, Habit Formation, Human Performance Methodology, Self-Regulation Training, Nervous System Regulation
Conflict of interest. The author owns Fulcrum Performance Lab LLC, Midtown Biohack and Nova Breath (the breathing application, and Nova Breath LLC, publisher of the book), and wrote the book Stress: Our Human Superpower.
Suggested citation: Morris III, Charles B. (2026). A Nervous System First Methodology: Regulation as a Trained Skill. SSRN. https://doi.org/10.2139/ssrn.7558721