Apple Watch users who wake up to inconsistent sleep data have a real problem: the device tracks sleep using optical heart-rate sensors and motion detection, but the accuracy of those readings depends ...

They remind you to move throughout the day, keep track of changes in your heart rate, keep you accountable around your step count and, for better or for worse, let you know when you've had a rough ...

Sleep is one of those things that works better the less you try to control it.

This feature is available on the Apple Watch Series 9 or later or Apple Watch Ultra 2 or later. Just make sure you have the ...

For a while now, I’ve worn two devices when I go to sleep—an Apple Watch Series 7 on my left wrist, and a WHOOP 5 MG on my right wrist. Every morning, I get three different scores purporting to tell ...

Plus, doctors’ number-one pick and their take on the devices.

Here's What 'Core Sleep' Means On Your Apple Watch—and Why It Matters originally appeared on Parade. It’s not exactly news that sleep is an important part of health. It’s also not exactly news that ...

ATLANTA (AP) — Your watch says you had three hours of deep sleep. Should you believe it? Millions of people rely on phone apps and wearable devices like rings, smartwatches and sensors to monitor how ...

AP Wearable devices, including Apple Watches, can be used to track sleep recently in Atlanta, Ga. ATLANTA — Your watch says you had three hours of deep sleep. Should you believe it? Millions of people ...

I don’t know how or when it happened, but I have become obsessed with tracking my health data. Formerly, I would toss and turn, wondering what had caused my sleepless nights, or donned a new pair of ...

Your watch says you had three hours of deep sleep. Should you believe it? Millions of people rely on phone apps and wearable devices like rings, smartwatches and sensors to monitor how well they’re ...