Track your heart rate, steps, and more as you get your exercise in each day.

Forger takes a more favorable view toward the devices, which he says help keep the overlooked importance of sleep front of ...

At the CES event in Las Vegas this week, Fitbit unveiled a new Bluetooth Smart-enabled, wrist-worn activity tracker, called Fitbit Flex. Like most of Fitbit's other trackers, the Flex also promises to ...

From strength training to sleep and recovery, these wearables stood out for turning raw data into useful action.

Millions use phone apps and wearables to track sleep. These devices infer sleep states from movement and heart rate, leading to questions about data reliability. The US sleep-tracking market is ...

Your sleep data is screaming long before you feel exhausted, and three red flag metrics consistently predict trouble. I focus ...