Your heart rate can tell you a lot about your fitness and cardiovascular health. Your heart beats consistently, day in and day out, but you may not generally pay close attention to it. You might take ...

You might love the motivating tempo for workouts or the cadent call for calm that a smartwatch heart rate monitor provides. But when it’s time for an upgrade, what ...

We test the best heart rate monitors for tracking your heart rate comfortably, consistently and accurately when cycling or working out When you purchase through links on our site, we may earn an ...

Want to know if somebody is lying? It’s always so hard to tell. [dbmaking] has whipped up a fun little polygraph, otherwise known as a lie detector. It’s nowhere near as complex as the ...

Published in the Journal of Pharmaceutical Analysis, the research explores how sweat could be used to follow changes in ...

Fitbit's Charge series has long been the Goldilocks of fitness trackers — not quite a smartwatch, but far more capable than a basic step counter. With the Charge 6 (released in 2023), Fitbit packed ...

Wi-Fi! It’s everywhere, and yet you can’t really see it, by virtue of the technology relying on the transmission of electromagnetic waves outside the visual spectrum. Never mind, ...

Now, you can simply drop JPG, JPEG, or PNG photos into the folder that you bind mounted to the Docker container. The ...

A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.