Your heart rate is one of the most standard yet essential health metrics. Soon, it may be easier to measure. Macy is a writer on the AI Team. She covers how AI is changing daily life and how to make ...

Heart rate variability (HRV) is the variation in the time between two consecutive heartbeats over a specific period. Doctors may use HRV as an indicator for certain aspects of a person’s health, ...

As a cardiovascular physiologist, I measure heart rate in nearly every experiment my students and I perform. Sometimes we use an electrocardiogram, such as you’d see in a medical clinic, which uses ...