We may earn a commission from links on this page. The Powerbeats Pro 2 are a new set of headphones with a really interesting feature—Apple says they can measure your heart rate during workouts. Huge ...

Heart rate reserve (HRR) is the difference between your resting heart rate and your maximum heart rate. Knowing this number can help you train and work on your fitness goals. Your heart rate reserve ...

Your heart beats faster when you’re working hard, so it’s a good way to tell if you’re exercising hard enough...right? Well, not exactly. Your heart rate is only a good gauge of effort in certain ...

The AirPods Pro 3 are equipped with a heart rate sensor that can send real-time data to multiple apps. (Apple) Your AirPods may soon become your most important pieces of fitness gear. One of the ...

Average heart rates vary widely. During stress, the body releases hormones that trigger a “fight or flight” response. A person’s heart rate may increase and exceed 100 beats per minute (bpm).

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 ...