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WiFi signals can measure heart rate—no wearables needed
(news.ucsc.edu)
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this post was submitted on 04 Sep 2025
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They already can by putting your finger on the camera and lighting up your finger with the led light. Then it detects the rhythmic changes picked up by the camera... At least 10+ years ago. It was a good novelty feature, but turns out, for most healthy people, checking your heart rate gets old after a few runs.
I saw demos online where they could also determine heart rate through video. The example I saw was a video of a newborn's face.