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Vagus Nerve Stimulation & HRV (N=1 Data)
Transcutaneous vagus nerve stimulation (tVNS) via Nurosym or Pulsetto shows mixed HRV effects across N=1 reports.
N=1 Evidence
- Steve_Combi (age 65-75): tVNS 3–4×/week
- Neo (age 46): Pulsetto VNS near-daily + other interventions
- Dr. James Gill: Nurosym tVNS regular use
Results vary widely; VNS as a standalone has not shown the large effects seen with cold exposure, breathwork, or HRV biofeedback in this dataset.