"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Using a wearable might seem like a foolproof way to learn about your body. But when it comes to sleep, ...

Many smartwatches, fitness and wellness trackers now offer sleep tracking among their many functions. Subscribe to our newsletter for the latest sci-tech news updates. Wear your watch or ring to bed, ...

There’s so much advice out there about how to fall asleep, how to stay asleep, how many hours of sleep you need, what to eat before bed for better sleep—you could spend months, if not years, trying ...

Sleep has become the new frontier of performance, recovery, and overall health — and wearables have rushed in to promise deeper insight than ever. From rings and watches to bedside sensors and ...