Cleveland Clinic researchers found that no wrist device that measures heart rate was as accurate as the gold standard electrocardiogram, and some, including Fitbit, were worse than others.

Effects of pressure and temperature on the electrocardiogram (EKG) and heart rate of crabs from the Galapagos deep-sea (2500 meters) hydrothermal vents were studied. Vent crabs require high ...

Fitness trackers aren’t very accurate when it comes to measuring heart rate, especially if you’re doing a hard workout, researchers say. This could be risky for people who might push ...