But how do fitness trackers measure your heart rate, exactly? And how accurate are these measurements? We asked the experts. Most fitness watches and smart rings depend on a technique called ...

Pulse measurement equipment is now easier to use than ever before, with many devices offering easy-to-align solutions and plug-and-play computer operation, reports Neil Savage. Ultrafast lasers ...

Or, you can use it as a rudimentary way to measure your heart rate and blood oxygen levels. It’s by no means a medical grade tool, but this build from [Taste The Code] is still quite impressive.

Apple is launching its first earphones that can measure pulse. For months, there has been speculation that the iPhone maker ...

By observing the frequency of the light-dark color change, we can back out the heart rate. This is exactly how [Andy Kong] approached two methods of measuring heart rate from a webcam. The first ...