“Findings of a few studies done to date suggest that chronically anxious patients who undergo HRV biofeedback training experience significant improvements in general emotional well-being and reduced baseline anxiety. In one study healthy adults (45 total subjects) were randomized to an emotional self-management program versus a waitlist group that received no treatment. Significant reductions in cortisol levels and increased coherence in heart rate variability were found in individuals in the experimental group but not in the comparison group. The experimental group reported significant decreases in measures of guilt, hostility, burnout, anxiety and stress. These psychological changes correlated with significant reductions in serum cortisol levels and beneficial increases in measures of coherence in heart rate variability. “
