The American Heart Association uses a two-line rule of thumb to sort the guesswork out of cardio. Your estimated maximum heart rate is about 220 minus your age, moderate-intensity work happens at 50 ...

If you’ve ever glanced at your smartwatch mid-workout and wondered whether your heart rate is impressively low for how hard you’re working, or not high enough because you’re taking it too easy, you’re ...

When you track a strength training workout on a fitness watch, that watch will happily tell you what heart rate zones you were in during the workout. In fact, they'll do that for any workout, whether ...

Cardiologist shares age-appropriate gym guidelines to protect the heart, including safe target heart rate and warning signs ...

Thanks to the proliferation of smartwatches and fitness trackers, it’s never been easier to log your heart rate while running: Simply don the device (watch, monitor, or other wearable), start your ...