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Wrist-based heart rate monitors
Last discussed Jan 16, 2026
Optical sensors on wearable devices that estimate heart rate by measuring blood flow through the skin on the wrist.
Recently discussed in
The VO₂ Accuracy of Wearables | Peter Attia
Peter Attia · Jan 16, 2026
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Peter Attia
critical
"I went down the rabbit hole on this a year ago of looking at every single one of the wrist-based heart rate monitors and I was blown away at how inaccurate wrist-based heart rate monitors were."
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