HRV Training and Autonomic Resilience

Product Description

Heart rate variability — the beat-to-beat variation in the interval between consecutive heartbeats — is the most information-rich non-invasive physiological measurement available to the general population. A single morning HRV reading encodes information about autonomic nervous system balance, HPA axis status, cardiovascular fitness, recovery from yesterday’s stressors, sleep quality, immune activation, and readiness for physiological and cognitive demands.

HRV Training and Autonomic Resilience covers the complete HRV science: autonomic nervous system anatomy (sympathetic; parasympathetic; the vagus nerve); HRV metrics and what each measures (RMSSD; SDNN; pNN50; LF/HF ratio); the standardised morning HRV protocol; personal baseline establishment and the traffic light system (green/amber/red daily decisions); respiratory sinus arrhythmia and the resonance frequency (4.5–6 breaths per minute); HRV biofeedback evidence (hypertension; depression; anxiety; performance anxiety); HRV-guided training periodisation and the overtraining syndrome; polyvagal theory and the social engagement system; and autonomic resilience building (the tier-1 and tier-2 intervention hierarchy).

The 12-week Autonomic Resilience Protocol provides two tracks — Track A (performance optimisation) and Track B (HPA restoration) — with daily monitoring, biofeedback practice, and exercise integration.

Guide 3 of 5 in the Stress and Recovery Series.