HRV? What does Heart Rate Variability actually measure
HRV scores your ability to stay resilient, to stabilize heart, to recover, deep sleep and so much more
It's the body's performance metric.
18% increase in HRV and 61% increase in vagal parasympathetic activity compared to placebo (PLOS ONE journals)
Scientific Explanation
RMSSD measures HRV (heart rate variability) and is sensitive to parasympathetic changes. A high level indicates a favorable shift in your nervous system balance toward parasympathetic dominance, boosting the body's psychophysiological self-repair mechanism and nervous system resilience.
In a two-stage trial, Nurosym neuromodulation produced 61% increase in vagal tone (HF power), and 18% increase in HRV. These effects persisted beyond the trial, demonstrating a carry-over effect.
The hidden system underpinning HRV – parasympathetic activation
Nurosym is third-party tested by the world's leading institutions
Trusted by over 60 internationally recognised institutions
Nurosym by Numbers
Research-Driven Impact
"When it comes to anxiety the papers I've looked at do provide evidence of support that transcutaneous vagal nerve stimulation is effective at improving parasympathetic drive, it can reduce fatigue and personally I've seen this improves my HRV when using this device."
Dr. James Gill
Associate Professor at Warwick Medical School
Framework: Activate. Execute. Recover. Reset.
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Hundreds of positive stories from users seeking performance & endurance
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Meet the Doctors
A practicing doctor of psychiatry, Elisabetta has an MBA from INSEAD Business School, and experience in direct patient care, neuroscience research, communication and management. Dr. Burchi is a physician-scientist, working with Parasym in clinical affairs with a track record of publishing in the most important scientific journals such as The Lancet, writing successful grant proposals for the NIH, and leading the production of editorial, clinical, regulatory and promotional material in collaborative multidisciplinary teams. Dr. Burchi has also coordinated clinical trials and implemented a tele-medicine practice which received a certification of excellence among more than 100,000 professionals.