Key facts
- Measures beat-to-beat timing variation.
- Higher HRV generally signals better recovery.
- Tracked by many wearables and apps.
- Best interpreted as a personal trend, not a single number.
Even at a steady heart rate, the exact gap between beats varies slightly, and that variation is HRV. It reflects the balance of your nervous system: higher variability usually indicates a well-recovered, relaxed state, while lower HRV can signal stress, fatigue, or incomplete recovery.
Many wearables now track HRV to gauge 'readiness'. It's a useful tool, but it's highly individual and noisy day to day, so it's best read as a personal trend over time rather than an absolute score. A consistent drop can be a cue to ease off; a stable or rising trend suggests you're recovering well.
Frequently asked questions
What does high heart rate variability mean?
Higher HRV generally indicates a well-recovered, relaxed nervous system. Lower HRV can signal stress, fatigue, or insufficient recovery — though it varies a lot between individuals.
How should I use HRV data?
Track your own trend over time rather than comparing to others. A consistent decline suggests prioritizing recovery, while a stable or rising trend indicates you're handling training well.
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