Your heartbeat is one of the simplest signals your body gives off, but it reveals a lot about your health. It changes with your activity, stress, and even how hydrated you are.
Until recently, thou… [+5691 chars]
Tech breakthrough uses Wi-Fi signals to measure heart rate with no wearable devices needed - Earth.com
Researchers created Pulse-Fi, a system using WiFi signals to measure heartbeats accurately without wearables.
Source:Earth.com
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