Of all the electrical signals generated by the human body, those coming from the heart are probably the most ... ECG system the size of a credit card, cleverly dubbed Card/IO, that clearly ...

Heart rate monitor straps are pretty much what they sound like. It's an elastic strap that you wear around your chest that's equipped with electrodes, which then transmit your heart rate data ...

What caught my attention, however, was the built-in heart rate monitor. These sensors sit on the side of each earbud and track your heart rate through your ear. It's like having a little Apple ...