The $99 Mio Link uses its optical sensor to track your heart rate.
Got a tattoo on your wrist? You could find it difficult to get an Apple Watch to track your heart rate. It's all about the way the ink blocks light from built-in sensors.
Is there room for a plain old fitness band with no screen in an age of smartwatches? Jawbone's new band has fantastic software, but its heart rate tracking's just not useful enough.
Data from the Very Large Telescope in Chile suggests that it would be more appropriate to call the Eagle Nebula's famous gas formation the "Pillars of Destruction."
CNET's Michael Franco interviews the author of the new book "100 Things Avengers Fans Should Know and Do Before They Die," and gets 10 of them for readers.
The Up3 is one of the smallest super-slim fitness bands around, but its lack of a display and limited heart rate tracking aren't worth the high price.
A trio of new Jawbone fitness bands are on their way: two coming soon, one later this summer. They're slimmer, and they're ambitious. And we have two of them here to review.
Researchers have created a "heart on a chip" using actual cardiac muscles to help test the effects of heart medication.
First V1sion is a startup that places you on the field of play by placing cameras and heart-rate monitors in the shirts of top sports players.
It's a hat. It's a heart rate hat. Why? Well, see for yourself. Heads-on in Barcelona.