Let's say you fell asleep last night at 11pm and woke at 7am, getting 8 hours of what seems like good rest. So, why are you still tired in the morning? It's probably because you aren't getting ...

Over the past decade, we've seen a boom in gadgets that claim to track all sorts of health metrics, from heart rate to calories burned. Many of these wearables can also be used to measure the quantity ...

Add Yahoo as a preferred source to see more of our stories on Google. For years now, we've been told that we have to get enough sleep to maintain our physical and mental health. But in reality, the ...

A high-tech sleep intervention.

Sleep tracking is nothing new in Garmin’s fitness watches, but the company’s latest wearable is a dedicated smart sleep band. The Index Sleep Monitor offers week-long battery life with continuous ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. The Apple Watch has a ...