Eric Topol: wearable HRV and readiness scores lack evidence of health benefits
EricTopol · x · 2026-09-21
Eric Topol argues that Apple's new Readiness score (0-10) and 24x more frequent HRV readings — like similar features from Oura, Garmin, and WHOOP — are marketed as markers of autonomic health, disease prediction, and longevity without proof.
Key points:
- HRV only roughly reflects autonomic nervous system activity; individuals with the same heart rate can have very different HRV, so it can't determine whether ANS function is abnormal
- Over 100 million US adults use wearables, and marketing claims far outpace the science
- Core question: are these metrics validated? Does working to raise them actually improve health? Topol's answer: the evidence is lacking
Related event: Eric Topol Questions Evidence Behind Wearable HRV and Readiness Scores(3 posts)→
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