"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you are an athlete in training or simply keeping tabs on your vitals, measuring your heart rate is a ...

The best heart rate monitors will track your heart rate comfortably, consistently and accurately ...

Tracking your heart rate with a heart rate monitor (HRM) during your runs is one of the most powerful ways to optimize your training, whether you're a dedicated marathoner, power triathlete, or just ...

The idea of a heart-rate monitor might sound a bit pointless if you’ve already got one built into your running watch, but what many people don’t realise is that, for those more serious about their ...

A heart rate monitor may be the key to unlocking your fitness goals. That’s because heart rate is a reliable indicator of your exercise input—it reflects the effort applied to every workout. Keeping ...

From watches to chest straps, a heart rate monitor can optimize your workouts. Polar, Garmin, and Fitbit top our list. See what else we’re wearing to run, swim, cycle, and more. Heart rate monitors ...

The S3 heart sound occurs as the mitral valve opens and allows blood to fill the left ventricle passively. The sound happens as a result of blood striking the left ventricle during early diastole. An ...