Heart Rate Variability Biofeedback in a Global Study of the Most Common Coherence Frequencies and the Impact of Emotional States

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. Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania.
Analysis of 1.8M HRV biofeedback sessions showed positive emotions link to higher coherence, suggesting deeper breathing enhances emotional stability.