Meditation and Heart Rate Variability

Meditation and Heart Rate Variability refers to research on how contemplative practices influence autonomic nervous system regulation as measured by HRV.

Summary

HRV — the variation in time between heartbeats — reflects autonomic balance and is a biomarker for stress resilience. Numerous studies have measured HRV during and after meditation.

Key Findings

Meditation practices reliably increase high-frequency HRV (parasympathetic tone) and reduce low-frequency/high-frequency ratios. Effects are observed both acutely during practice and as trait changes with sustained training. Resonance frequency breathing at approximately 6 breaths per minute maximizes HRV.

Methodology

Studies use electrocardiography and photoplethysmography during meditation sessions and at rest. RCTs compare meditators to controls over weeks to months. Frequency-domain and time-domain HRV indices are standard outcomes.

Limitations

Acute effects may not translate to trait changes. Individual variability in baseline HRV is large. Medication use (beta-blockers, anticholinergics) confounds measurement.

Verification Notes

• Systematic reviews by Tyagi & Cohen (2016) and Goyal et al. (2014) are foundational.
• Literature reviewed through 2020s.