Sleep Habits

Accuracy Unpacked: What 'Accurate Data' Really Means for Your Sleep Goals

Why 'Accurate' Is More Complicated Than You Think When I first started testing sleep trackers, I made the classic mistake: I assumed a device that matched my lab-polysomnography sleep stage percentages was "accurate." After wearing five different trackers simultaneously for two weeks and comparing them to a research-grade Actigraph, I learned that accuracy isn't one …