It starts with a feeling you can’t quite explain; a sense that something isn’t right. Maybe it’s dismissed as overthinking or ...

Where (and how) you wear your health tracker can impact your data accuracy. Here's what researchers say matters most.

Smartwatches commonly use heart rate variability to monitor stress. Columnist Helen Thomson explores what this metric ...

I spoke with a doctor at Apple to learn more about the Apple Watch health features that you might not currently be using to ...