Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings.

The differences, or bias, between estimates of blood oxygen saturation levels as measured with pulse oximeters compared to the gold-standard method of measuring oxygen saturation in arterial blood ...

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 ...

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 ...

They use electrodes against your skin to monitor the electrical activity, whereas most other heart rate monitors are 'optical', meaning they send a ray of light into your skin and measure the ...

Aria Gen 2 has a PPG sensor for measuring heart rate and a contact microphone to distinguish the wearer’s voice from that of bystanders. Meta says that the 75-gram Aria Gen 2, which can perform ...

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 ...