Five Minutes of Slow Breathing Rewires Your Nervous System: What a New Wave of Clinical Research Reveals About Vagal Tone, Heart Rate Variability, and the Most Underused Tool in Medicine
A 2025 scoping review confirms that slow breathing at six cycles per minute significantly improves vagal tone, heart rate variability, and autonomic flexibility. Combined with the Stanford cyclic sighing trial and new anxiety research showing effect sizes rivaling medication, the evidence for structured breathwork as a first-line health intervention has never been stronger. Here is what the science says and exactly how to build a protocol that works.
