Vital signs
Heart Rate Variability
LOINC 80404-7 · ms
What it is
Heart rate variability (HRV) is the natural variation in time between heartbeats. It reflects the balance of your nervous system.
Why it matters
Higher HRV often reflects good recovery, fitness and stress resilience, and is tracked by many wearables.
What high values can mean
A higher value generally reflects good recovery and a relaxed, well-balanced nervous system.
What low values can mean
A lower value can reflect stress, fatigue, illness or poor recovery, and is best read as a personal trend.
How to improve it
Good sleep, regular exercise, recovery days, hydration and stress management tend to improve HRV over time.
Food & lifestyle
Consistent sleep, balanced training with rest, limiting alcohol and managing stress support a healthier HRV.
Preparing for the test
Best measured at rest, often overnight or first thing in the morning under consistent conditions.
When to talk to a doctor
HRV is a personal trend rather than a diagnosis; discuss big sustained drops with a clinician if concerned.
Related markers
Sources
- NIH (NCBI)
- Cleveland Clinic
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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