Wearable fitness trackers provide sleep data that can give you insights about the duration and quality of your sleep. A doctor explains which metrics matter the most, and how to use the data to ...

Apple added a new Sleep Score feature that gives you a single number to sum up how you slept. It pulls data from your Apple Watch and turns it into an easy rating you can check first thing in the ...

Like many Americans, I know I need more sleep. I’m a night owl, often writing late into the night, but also a mom who gets up early with her kids. The result: I’m not getting enough rest. When I ...