Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness ...

Get to know the link between your effort level and your heart rate. Plus, how to use heart rate to your performance advantage ...

In this setting, the atrial rate (P waves) and ventricular rate (QRS complexes) are at different heart rates. One quick and easy way to measure the ventricular rate is to examine the RR interval ...

Heart rate monitor straps are pretty much what they sound like. It's an elastic strap that you wear around your chest that's equipped with electrodes, which then transmit your heart rate data ...

Heart rate is measured in beats per minute (bpm). During exercise the heart rate increases so that sufficient blood is taken to the working muscles to provide them with enough nutrients and oxygen.