Basic Research
Psychophysiology, Heart-Brain Interactions and Coherence
Psychophysiological Correlates of Spiritual Experience – Hea… View more
Biofeedback 2001; 29(4):13-17. Copyright © 2002 by AAPB. Posted with permission from AAPB/Biofeedback. For more information on AAPB and Biofeedback magazine, go to: www.aapb.org.Sustained positive emotions foster heart-brain coherence, enhancing emotional stability, cognitive performance, health, and spiritual connectedness.
Cardiac Coherence, Self-Regulation, Autonomic Stability, and… View more
Frontiers in Psychology, Sept. 2014. Vol. 5, Article 1090.Emotional self-regulation is key to well-being. Heart-brain communication affects cognitive and emotional function. Positive emotions increase bodily coherence, facilitating higher cognition and calm states.
Personality and Heart Rate Variability – HeartMath Institute
Open Journal of Social Sciences, 2013. Vol.1, No.6, 32-39, Nov. 2013.Personality traits correlate with heart rate variability, linking autonomic regulation to health. Character traits relate to autonomic balance, while other traits affect HRV variables.
The Global Coherence Initiative: Creating a Coherent Planeta… View more
Global Advances in Health and Medicine 2012; 1(1):64-77; www.gahmj.com.The Global Coherence Initiative promotes heart-based living and collective intention to foster global balance and peace, leveraging interconnectedness and consciousness.
Coherence: Bridging Personal, Social, and Global Health – He… View more
Biofeedback 2002; 30(1):23-25. Alternative Therapies in Health and Medicine, A Peer-Reviewed Journal, 2010; 16 (4):10-24.The abstract discusses coherence in the universe and living systems, its impact on personal well-being, and its potential for global harmony. It explores the interconnectedness…
Cardiac Coherence and Posttraumatic Stress Disorder in Comba… View more
Shirley L. Buchanan Neuroscience Laboratory, Dorn VA Medical Center, Columbia, SC. 2009.PTSD in combat veterans from Afghanistan and Iraq is linked to reduced cardiac coherence and cognitive deficits. This study examines their co-occurrence for the first…
The Coherent Heart: Heart–Brain Interactions, Psychophysiolo… View more
Integral Review, December 2009, Vol. 5, No. 2.This study explores emotion, emphasizing coherence as an optimal state. It examines heart-brain interactions, linking coherence to well-being and improved cognitive performance.
Emotional Stress, Positive Emotions and Psychophysiological … View more
Chapter published in: Stress in Health and Disease, edited by B. B. Arnetz and R. Ekman. Weinheim, Germany, Wiley-VCH, 2006: 342-365.Recent research shows emotions, not just thoughts, activate stress responses. HeartMath's tools use positive emotions to manage stress and break negative patterns.
The Grateful Heart: The Psychophysiology of Appreciation – H… View more
Chapter published in: The Psychology of Gratitude, edited by R. A. Emmons and M. E. McCullough. New York: Oxford University Press, 2004: 230-255.Research supports the heart's role in emotions, especially positive ones. A model integrating heart, brain, and hormones explains emotional experiences. Heart-based techniques can induce positive…
Heart Rhythm Coherence – An Emerging Area of Biofeedback – H… View more
Biofeedback 2002; 30(1):23-25. Copyright © 2002 by AAPB. Posted with permission from AAPB/Biofeedback. For more information on AAPB and Biofeedback magazine, go to: www.aapb.org.Heart rate variability feedback, especially heart rhythm coherence training, promotes physiological coherence for stress reduction and performance enhancement.
A Healthy Heart is Not a Metronome: An Integrative Review of… View more
Frontiers In Psychology, September 2014, Vo. 5, article 1040.HRV reflects complex regulatory systems adapting to challenges. This review covers neural heart regulation, HRV interpretation, and its link to health and brain function.
The Effects of Different Types of Music on Mood, Tension, an… View more
Alternative Therapies in Health and Medicine. 1998; 4(1): 75-84.144 subjects tested music's impact on mood. Grunge rock increased negativity; designer music boosted positivity. Classical and New Age had mixed effects. Designer music shows…
Cardiac Coherence: A New, Noninvasive Measure of Autonomic N… View more
Alternative Therapies in Health and Medicine. 1996; 2(1): 52-65.Study of 20 subjects reveals emotional states affect autonomic balance. Three modes identified: normal, entrainment, and internal coherence. Positive emotions maybe beneficial in reducing hypertension.
Head-Heart Entrainment: A Preliminary Survey – HeartMath Ins… View more
Paper presented at the Key West Brain-Mind, Applied Neurophysiology, EEG Biofeedback 4th Annual Advanced Colloquium, Key West, FL, Feb. 1996.Study examines entrainment between HRV, respiration, and EEG in 5 subjects using self-management. Findings show frequency-locking and cross-correlations among biological oscillators.
HRV Biofeedback in a Global Study of the Most Common Coheren… View more
Scientific Reports, (2025) 15:3241. DOI: https://doi.org/10.1038/s41598-025-87729-7.1. HeartMath Institute, Boulder Creek, CA, USA.2. Capitol Technology University, Laurel, MD, USA.3. Faculty of Mathematics and Natural Sciences, Kaunas University of Technology, Kaunas, Lithuania.4….
Heart- focused breathing technique and attitude breathing te… View more
https://physoc.onlinelibrary.wiley.com/doi/10.14814/phy2.70589Respiratory control improves HRV and cardiorespiratory coherence, with anxious females showing lower rMSSD/HF and significant sex and anxiety differences.
Music Enhances the Effect of Positive Emotional States on Sa… View more
Stress Medicine, Vol. 12: 167-175, 1996.The Physiological and Psychological Effects of Compassion an… View more
Journal of Advancement in Medicine. 1995; 8(2): 87-105. Reprinted by permission.The Effects of Emotions on Short-Term Power Spectrum Analysi… View more
American Journal of Cardiology. 1995; 76(14): 1089-1093.New Electrophysiological Correlates Associated with Intentio… View more
Subtle Energies. 1995; 4(3): 251-262. Published by ISSSEEM, 356 Goldco Circle, Golden CO 80403. Internet Address: 74040, [email protected].Heartmath Approach to Self-Regulation and Psychosocial Well-… View more
Journal of Psychology in Africa. Vol. 30, No. 1, 69–79, 2020. DOI: https://doi.org/10.1080/14330237.2020.1712797.Self-regulation of emotions affects physiology and cognition. Heart-brain communication influences emotional flexibility and social connection, leading to improved health and wellness.
Report on a Case Study Process Evaluation of a HeartMath Int… View more
Dialgo, ISSN: 2393-1744, Vol. 11, Issue 1 (December 2024): pp. 323‑335.. DOI: https://doi.org/10.51917/dialogo.2024.11.1.23.A HeartMath case study explored coherence, resilience, and faith post-trauma, revealing positive changes, correlations, and integrated thematic mechanisms of change.
Effect of Heart Rate Variability Biofeedback Training on Sco… View more
NSSEC-24, National Social Sciences & Education Conference (Virtual), E-BPJ 9(SI20), 2024 (pp.115-122)A 12-week HRV biofeedback study on shooters showed improved performance, reduced stress, and enhanced parasympathetic activity in the experimental group.
Exploring the Effects of Shared Heart-Focused Intention in M… View more
Association for Applied Psychophysiology & Biofeedback, 2023. Volume 51, Issue 2, pp. 36-43. DOI: https://doi.org/10.5298/1081-5937-51.02.02.A study on shared group intention in a string quartet showed improved HRV, focus, and connectivity in musicians, enhancing performance engagement for audiences.
Phasic Induction of Bioelectromagnetic Heart-Brain Coupling … View more
Journal of Xi’an Shiyou University, Natural Science Edition, Vol. 19, Issue 4, April 2023. ISSN: 1673-064X.Study explores heart-brain coupling variations during emotional stimuli, finding enhanced coupling during ventricular repolarization and attenuated brain responses in self-talk conditions.
Can Heart Rate Variability Be a Bio-Index of Hope? – HeartMa… View more
Frontiers in Psychiatry, Vol. 14, 2023. DOI: https://doi.org/10.3389/fpsyt.2023.1119925.Hope affects thinking, emotions, and behavior. Previously measured subjectively, this study explores Heart Rate Variability as a potential objective bio-index for hope levels.
Following the Rhythm of the Heart – HeartMath Institute
Springer Science+Business Media, LLC, part of Springer Nature, 2022. DOI: https://doi.org/10.1007/s10484-022-09554-2.This paper covers the lab's contributions to heart rate variability research, including biofeedback for stress reduction and performance enhancement, with future directions explored.
The Variation of Geometrical Shapes of Reconstructed Attract… View more
Cardiol Vasc Res. 2021; 5(1): 1-4. ISSN: 2639-8486.Geometrical synchronization of embedded attractors from HRV data reveals temporary coherence and group dynamics during the Heart Lock-In experiment.
Overview of Heartmath Coherence Model in Advancing Health an… View more
Proceedings of Academics World 158th International Conference, Cape Town, South Africa, September 2020.This study overviews the HeartMath coherence model, exploring its role in advancing health and medical science across physiological, social, and global levels
Development and Evaluation of a Cardiac Coherence Index for … View more
Journal of Psychology in Africa, 30:1, 44-52, 2020. DOI: 10.1080/14330237.2019.1689460.The Cardiac Coherence Index (CCI), based on heart inter-beat interval spectral entropy, links high CCI to deep sleep, low to wakefulness, and medium to dreaming.
Association between individual differences in interoception … View more
https://doi.org/10.1016/j.physbeh.2025.114877This study examined the link between interoception and cardiac coherence in HRV biofeedback, finding vmHRV and subjective interoception as key factors for training effects.
Shift Work and Heart Rate Variability Coherence – HeartMath … View more
Applied Psychophysiology and Biofeedback, 2018. DOI: 10.1007/s10484-018-9419-zStudy on 18 nurses found day shifts had increased HRV coherence during sleep (circadian rhythm), while night shifts showed autonomic dysregulation, suggesting HRV coherence as…
Heart Rate Variability and Cognitive Bias Feedback Intervent… View more
Military Medicine, Vol. 00, 0/0 2018Pre-deployment PTSD prevention efforts in the military have a long history. Effective strategies are still needed to prevent post-deployment PTSD.
An Empirical and Experiential Investigation into the Contemp… View more
HTS Teologiese Studies/Theological Studies. 74(1), 4746, 2018. DOI: https://hts.org.za/index.php/hts/article/view/4746A study on joy's effects found improved psychophysiological coherence, spirituality, and positive emotions through direct contemplation, supporting the paradox of joy through suffering.
Influence of HeartMath Training Programme on Physiological a… View more
Global Journal of Health Science; Vol. 10, No. 2; 2018. ISSN 1916-9736 E-ISSN 1916-9744.Study on HeartMath training's impact on HRV, coherence, mindfulness, and relaxation. Results show significant improvements across measures, with positive participant experiences.
Heuristic Psychological Case Study of Heartmath Practice for… View more
African Journal for Physical Activity and Health Sciences (AJPHES) Volume 22(4:2), December 2016, pp. 1125-1139.This study evaluated HeartMath training's impact on HRV, coherence, mindfulness, and relaxation in 13 adults, showing significant improvements and positive experiences.
Heart Rate Variability: Pre-Deployment Predictor of Post-Dep… View more
Elsevier, Biological Psychology Volume 121, Part A, December 2016, Pages 91-98Study of 343 soldiers found lower pre-deployment heart rate variability predicted higher post-deployment PTSD symptoms, especially with higher initial PCL scores.
Influence of Heartmath Quick Coherence Technique on Psychoph… View more
African Journal for Physical Activity and Health Sciences (AJPHES) Volume 22(4:1), December 2016, pp. 1006-1018This study found that five HeartMath sessions improved psychophysiological coherence, reduced negative feelings like sadness, and increased positive feelings like peacefulness.
Heart-Brain Neurodynamics: The Making of Emotions – HeartMat… View more
In Issues of the Heart: The Neuropsychotherapist special issue, M. Dahlitz, & Hall, G., Editor 2015, Dahlitz Media: Brisbane. p. 76-110. www.neuropsychotherapist.com.Recent scientific advances clarify emotion's role, exploring its relationship with intellect and the body-brain connection. A systems model presents the heart as key in emotional…
Heart Rate Variability: New Perspectives on Physiological Me… View more
Global Advances in Health and Medicine 4.1 (2015): 46-61.Heart rate variability reflects complex regulatory systems adapting to challenges. This review explores neural heart regulation, mechanisms of HRV rhythms, and their interpretation in health…