Morning Coherence

Marcy and Jack open Season 2 with eighteen commercial pilots who learned Quick Coherence during the pandemic — and hit the same coherence level in the cockpit as at home — plus the morning practice.

Read the paper: Quick Coherence Technique Facilitating Commercial Pilots' Psychophysiological Resilience to the Impact of COVID-19 (Wen-Chin Li, Jingyi Zhang, Graham Braithwaite, Peter Kearney, 2022, Ergonomics) — https://doi.org/10.1080/00140139.2022.2139416

Marcy and Jack close out the first twenty papers with the Intuitive Heart booklet — sorting real pattern intuition from contested claims about sensing the future, plus the morning practice.

Read the paper: The Intuitive Heart – Accessing Inner Guidance To Raise Our Consciousness Baseline (Rollin McCraty, Doc Childre, 2014, HeartMath Research Center monograph) — https://www.heartmath.org/research/research-library/intuition/the-intuitive-heart-accessing-inner-guidance-to-raise-our-consciousness-baseline/

Marcy and Jack dig into a two thousand four study where heart-rate patterns diverged about four and a half seconds before emotional photos — and the honest caveats that keep it contested, not proven — plus the morning practice.

Read the paper: Electrophysiological Evidence of Intuition: Part 1. The Surprising Role of the Heart (Rollin McCraty, Mike Atkinson, Raymond Trevor Bradley, 2004, Journal of Alternative and Complementary Medicine) — https://www.heartmath.org/research/research-library/intuition/electrophysiological-evidence-of-intuition-part-1/

Marcy and Jack dig into a two thousand fifteen study of seventy-one dementia caregivers — three months of heart-coherence workshops, burnout dropping, results holding at six months, and the honest no-control-group caveat — plus the morning practice.

Read the paper: Heart Coherence: A New Tool in the Management of Stress on Professionals and Family Caregivers of Patients with Dementia (C. M. Sarabia-Cobo, 2015, Applied Psychophysiology and Biofeedback) — https://doi.org/10.1007/s10484-015-9276-y

Marcy and Jack dig into a nineteen ninety-eight study where a month of heart-coherence practice was linked to twenty-three percent lower cortisol and doubled DHEA — with the honest caveats held — plus the two-minute recalibration practice.

Read the paper: The Impact of a New Emotional Self-Management Program on Stress, Emotions, Heart Rate Variability, DHEA and Cortisol (Rollin McCraty, Bob Barrios-Choplin, Deborah Rozman, Mike Atkinson, Alan D. Watkins, 1998, Integrative Physiological and Behavioral Science) — https://www.heartmath.org/research/research-library/clinical-health-research/impact-of-emotional-self-management-program-on-stress-emotions-hrv-dhea-cortisol/

Marcy and Jack take on a two thousand twenty-five review — how stress retrains the nervous system's alarm, and what small trials say coherence practice can do about it — plus the two-minute recalibration practice.

Read the paper: From Dysregulation to Coherence: Exploring the HeartMath Approach to Emotional and Physiological Regulation (Elbers and McCraty, 2025, Global Advances in Integrative Medicine and Health) — https://doi.org/10.1177/27536130251408821

Marcy and Jack take on a two thousand sixteen prospective study — three hundred forty-three soldiers, a ten-minute resting heart reading taken before deployment, and what it could and couldn't predict — with the honesty caveat that prediction is not prevention, plus a two-minute settle-the-ledger morning practice.

Read the paper: Heart Rate Variability: Pre-Deployment Predictor of Post-Deployment PTSD Symptoms (Pyne, et al., 2016, Biological Psychology) — https://doi.org/10.1016/j.biopsycho.2016.10.008

Marcy and Jack take on a two thousand ten pilot study — ten combat veterans, four weeks of HRV biofeedback, sharper attention, and the honesty caveats that keep the science honest — plus a two-minute settle-the-snow-globe morning practice.

Read the paper: Cardiac Coherence and Posttraumatic Stress Disorder in Combat Veterans (Ginsberg, Berry, Powell, 2010, Alternative Therapies in Health and Medicine) — https://www.heartmath.org/research/research-library/basic/improving-cognition-in-recently-returned-combat-veterans/

Marcy and Jack take on the spiciest paper so far — the one behind the 'your heart broadcasts to other people' idea. What's measured physics, and what needs a much bigger grain of salt.

Read the paper: The Energetic Heart: Bioelectromagnetic Interactions Within and Between People (Rollin McCraty, 2002, Institute of HeartMath monograph)