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 ...

Millions of adults miss out on the recommended 7 to 8 hours of shut-eye every night. And over time, that sleep debt can mess with everything from your mood to your immune system. But the good news?

A month with the Apple Watch, along with its gentle nudges and a doctor’s guidance, helps the writer build a healthy sleep ...