Advances in Sleep Tech: From Wearables to FDA-Approved Diagnostics

Sleep trackers use accelerometers and photoplethysmography to estimate sleep duration and stages, but their accuracy varies, especially in distinguishing wakefulness and sleep stages. While they are useful for tracking sleep patterns and goals, they are less precise than clinical sleep studies, and behavioral changes are more effective for improving sleep quality. Users should choose validated devices and focus on long-term trends rather than daily fluctuations.