Don’t get me wrong, wrist-based heart rate tracking on smartwatches has improved loads over the years, but if you do anything ...

I've got a new apple watch, and one annoyance I have vs the previous FitBit is the lack of a heart rate graph for a workout. Are there any recommendations for such an app? Either iOS or Watch (or both ...

The Apple Watch Ultra 3 is a powerful health and fitness watch; that much was evident from its predecessor, the Apple Watch Ultra 2 (otherwise known as the best Apple Watch, in terms of features 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 redesign. There’s no change to the card in the Today tab, but the page ...

Every week or two, I'll open an athlete's training log and it seems like a blood-curdling scream leaps off the page. "My body is being weird! My heart rate was way too high on this run!" Or . . . "My ...

Most professionals regard resting heart rate as a reliable measure of fitness. But when it comes to training, keeping your heart rate in specific “zones” is more important for building stamina and ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...