As a certified personal trainer, I tested 14 wearables over eight months while training, running and swimming. Here are the ...

But the better trackers can identify trends in your sleep, monitor your activity and heart rate, and give advice on improving your rest and fitness. After testing five wearable sleep trackers, we’ve ...

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 ...

It’s all about quality, not quantity ...

We tested 8 popular devices to find the best sleep trackers that can help you wake up refreshed and energetic instead of groggy and tired. Two emerged as the best.

The wearable landscape has changed dramatically since the first fitness trackers arrived over a decade ago. For years, looking for a fitness tracker meant one thing: finding the best simple wristband ...

Millions of people rely on wearable devices to monitor how well they're sleeping. Sleep trackers don’t necessarily measure sleep directly but instead infer states of slumber from signals like ...

Earlier this year, Andrej Karpathy wrote an in-depth analysis of four sleep tracking methods that Federico recently recommended I read. I’m glad he did, Karpathy, an AI researcher who has worked at ...

Nearly half of adults (48%) have used a sleep tracking device, such as a smartwatch or app, to monitor their sleep quality and duration – up from 35% in 2023, according to a new survey from the Americ ...

"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, ...