Key Takeaway
Meta-analysis confirms HRV biofeedback significantly reduces self-reported anxiety and stress, with effects comparable to existing treatments.
Summary
This meta-analysis examined randomized controlled trials of HRV biofeedback for anxiety and stress reduction. Across 24 studies, HRV biofeedback produced significant reductions in self-reported anxiety and stress.
The effect sizes were moderate to large, comparable to established treatments for anxiety. Benefits were seen across various anxiety conditions and in both clinical and non-clinical populations.
The findings support HRV biofeedback as an evidence-based intervention for anxiety management.
Methods
- Meta-analysis of 24 RCTs
- Standardized effect size calculations
- Subgroup analyses by population and condition
Key Results
- Significant reduction in anxiety (Hedges' g = 0.81)
- Significant reduction in stress (Hedges' g = 0.83)
- Effects seen in clinical and non-clinical samples
- Comparable to existing anxiety treatments
Limitations
- Heterogeneous study designs
- Publication bias possible
- Long-term follow-up limited
- Active control groups rare