Sleep Tracking Technology
topic
Consumer sleep tracking devices — wearable accelerometers, optical heart rate monitors, and bed sensors — provide estimates of sleep duration, sleep stage proportions, heart rate variability, respiratory rate, and temperature during sleep, with accuracy varying considerably by device and metric (duration reasonably accurate, stage classification significantly less so) and with the potential for both useful behavioral feedback and counterproductive 'orthosomnia' (performance anxiety about sleep metrics that itself degrades sleep quality).
Role
Sleep tracking technology offers the genuine benefit of behavioral feedback that most people have never had about their own sleep — making the invisible visible and enabling data-driven optimization rather than uninformed behavioral modification. The risk is equally genuine: the person who becomes anxious about a single poor-metric night, lies awake worrying about their sleep score, or makes decisions based on inaccurate stage classifications has converted a potentially helpful feedback tool into an anxiety amplifier. The key is treating tracking data as directional behavioral feedback rather than clinical measurement, and using it to identify consistent patterns rather than to optimize individual nights.