This article was originally featured on The Conversation. Your heart beats around 100,000 times every day. Heart rate is a key marker of cardiovascular activity and an important vital sign.

A pulse oximeter (or a “pulse ox” for short) is a device used to measure the body’s heart rate and oxygen levels. You’ll usually find them in hospital or clinical settings, but you can ...

But there's one important health metric many people aren't tracking yet: heart-rate variability, or the amount of time between your heartbeats. This metric, also called HRV, can give insight ...

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If you own a fitness tracker, you’ve likely come across the term HRV (heart rate variability). You may have even seen people proudly posting their HRV numbers on Instagram. But what can the ...

This is a painless process. The pulse oximeter will be able to tell you your oxygen saturation levels along with your heart rate. Pulse oximetry tests are an estimation of blood oxygen levels ...

In contrast, heart rate variability measures the time between individual beats. The research team explained that the measure can provide insight into the maturation of the foetal autonomic nervous ...

Anne R. Crecelius does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...