Athletes who follow heart rate-based training plans generally do the bulk of their workouts at lower intensities. That means ...

"I am not a natural athlete or exerciser," cardiologist Shaline Rao told Newsweek. "I look at it as part of preventative ...

Pulse oximetry is a noninvasive, painless test that measures the oxygen saturation level of your blood. Here’s how it works ...

Your watch already tracks heart rate, but turning on this view helps you adjust your workouts in real time. Here's how to do it.

While you might think that it is normal for your heart to be racing while exercising, it might not be so. Low heart rate ...

The accuracy of heart rate monitoring on Fitbit Charge devices has been a topic of significant discussion among users and ...

After last year’s revamp, Fitbit has been slowly updating more and more of the mobile app, with Heart Rate stats being the latest ...

In WatchOS 11 you can finally adjust your activity rings and take a rest day if you're sick. In the Activity app, tap on the ...