Assessing the clinical relevance of resonance frequency breathing for heart rate variability-based biofeedback.

A slow, steady breathing pattern of around six breaths per minute is being tested as a potential tool to calm anxiety, but researchers do not yet know if this specific frequency is the most effective one. This pilot study will compare several different breathing rates in healthy volunteers to see which one best boosts heart rate variability—a measurable sign of the body’s ability to shift between stress and relaxation. The problem is that current biofeedback therapies often prescribe a single “resonance frequency” breathing rate without solid evidence that it works better than other rates for reducing anxiety. The study will also check whether a person’s underlying anxiety traits influence how well each breathing pattern works. If the results identify a clear optimal breathing frequency, the next step would be to test that protocol in patients arriving at early intervention services for anxiety or psychotic disorders. A simple, drug-free breathing technique that reliably calms the nervous system could become a low-cost, accessible tool for mental health care. Because this is a small pilot study with healthy participants, it will not immediately change clinical practice—but it will provide the precise data needed to design a larger trial in a real patient population.