In this era of fitness trackers, we have easy access to our heart rate at any given moment. Every so often, a number catches ...

You track your VO2 max and working heart rate, but this underrated biometric may tell you more about your heart and long-term ...

We may earn a commission if you make a purchase through one of our links. McClatchy newsrooms were not involved in the creation of this content. As you grow older, your health issues can increase, and ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...