What is Heart Rate Variability (HRV)?

Heart Rate Variability (HRV) is calculated by measuring the variations in the intervals between consecutive heartbeats. The HRV value measured by amazfit devices is
RMSSD, which stands for the root mean square of successive differences between normal heartbeats. RMSSD primarily reflects the autonomic nervous system's ability to regulate the body, making it an important indicator of cardiac health, stress levels, and overall well-being.

Baseline

The baseline is the basic level of an individual's HRV, determined from approximately 7 days of continuous sleep HRV data. Comparing daily HRV variations to one's baseline can assess health status.

Normal Ranges and Health Implications

The normal range for HRV varies among individuals, influenced by age, gender, and personal health conditions. Typically, a healthy adult's HRV can range widely from 20 ms to 200 ms and decreases during aging.

Higher HRV may indicate good cardiac and autonomic nervous system adaptability, usually associated with lower stress levels and better recovery capabilities. Lower HRV may suggest high stress, fatigue, or other health issues.

How to Improve HRV

  • Regular exercise can improve HRV.
    Ensuring sufficient high-quality sleep is key to improving HRV.
  • Practicing meditation, deep breathing, or yoga can help
    reduce stress and improve HRV.
  • A balanced diet, avoiding excessive caffeine and alcohol,
    helps to improve HRV.

Note: For accurate Heart Rate Variability (HRV) measurements, please wear the device
properly and stay still. If the HRV Sleep Timeline curve is discontinuous, it
may suggest that these conditions were not met. Currently, only a select number of devices support the HRV Sleep

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