Smartwatch makers promise to turn your wrist into a sleep lab, translating tiny movements and heart rate blips into colorful ...

The Apple Watch 11 is supposed to be able to alert users about “possible hypertension” by using data from an optical heart rate sensor “to analyze how a user’s blood vessels respond to the beats of ...

The Garmin Index Sleep Monitor is a niche but powerful accessory that solves a long-standing problem for dedicated Garmin users: how to get sleep data without wearing a bulky watch to bed. It works ...