Sleep glossary
HRV
Updated
Many recovery wearables use HRV as one input in readiness or recovery estimates.
Plain-English definition
HRV stands for heart-rate variability, a measure of variation in the time between heartbeats.
Many recovery wearables use HRV as one input in readiness or recovery estimates.
Why it matters
It can be useful as a personal trend, but consumer devices and algorithms vary widely.
Buying relevance
Use this term as a practical buying clue, then check the current manufacturer wording, setup guidance, materials, and returns policy. It should not be treated as a medical claim or a guarantee of how a product will work for you.
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FAQs
Should I buy a tracker just for HRV?
Only if you want trend data and understand the limits. Do not use consumer HRV data as medical advice.