What Is Orthosomnia and How Sleep Trackers Backfire

The Paradox of Tracking Sleep

Hundreds of millions of people strap on a smartwatch or slip on a ring each night, trusting a device to grade their sleep. The global sleep-tracking market has exploded alongside wearables from Apple, Fitbit, Oura, and Garmin. For many users, the data is genuinely helpful. But sleep researchers have identified a troubling flip side: for a significant minority, the pursuit of a perfect sleep score becomes the very thing keeping them awake.

Clinicians call this phenomenon orthosomnia — a preoccupation with perfecting sleep tracker data that paradoxically disrupts the sleep it aims to improve.

How Consumer Sleep Trackers Work

Most wrist-worn trackers rely on two sensors. An accelerometer detects movement, distinguishing stillness (likely sleep) from restlessness (likely wakefulness). A photoplethysmography (PPG) sensor shines light through the skin to measure heart rate and heart-rate variability, which shift predictably across sleep stages. Algorithms combine these signals to estimate total sleep time, time spent in light, deep, and REM sleep, and how often the wearer woke during the night.

Research-grade sleep measurement — polysomnography — uses brain-wave electrodes, eye-movement sensors, and muscle monitors in a clinical lab. Consumer devices cannot match this. A 2023 multicenter validation study of 11 commercial trackers found that while total sleep time estimates were reasonably close to actigraphy (errors of roughly 5–14%), accuracy plummeted for individual sleep stages. Deep-sleep and REM-sleep errors exceeded 20%, and wake-detection errors ranged from 59% to over 138%.

In short, trackers are decent at answering "Did I sleep?" but unreliable at answering "How well did I sleep?"

When Data Becomes Distress

The term orthosomnia was coined in 2017 by researchers at Rush University Medical Center who noticed patients arriving at sleep clinics armed with tracker printouts, convinced their sleep was broken — even when lab tests showed otherwise. The prefix "ortho" (correct) mirrors orthorexia, the unhealthy obsession with healthy eating.

The mechanism is straightforward. A user checks their morning sleep score, sees a low number, and feels anxious. That night, anxiety about repeating a bad score delays sleep onset. The tracker records a worse night, reinforcing the worry. The cycle feeds itself.

A March 2026 study from the University of Bergen surveyed over 1,000 Norwegian adults and found that while 15% of sleep-app users reported improved sleep, 17% said the apps increased their worry about sleep. The effect was sharply age-dependent: roughly 23% of users aged 18–35 reported app-induced stress, compared with just 2.4% of those over 65. People already experiencing insomnia symptoms were the most vulnerable, reporting significantly higher rates of stress and anxiety from tracker feedback.

Who Is Most at Risk?

Researchers have identified several risk factors for orthosomnia:

• Pre-existing insomnia or anxiety disorders — tracker data amplifies existing worries
• Perfectionist personality traits — the quest for an ideal score mirrors perfectionism seen in eating disorders
• Younger age — digital natives are more likely to trust and react to app-generated metrics
• Excessive time in bed — some patients stay in bed longer trying to boost their tracked sleep duration, which paradoxically fragments sleep

A 2025 study published in Frontiers in Sleep developed the Bergen Orthosomnia Scale (BOS), the first standardized tool for measuring the condition, signaling that clinicians increasingly view it as a distinct and growing problem.

What Experts Recommend

Sleep specialists do not advise abandoning trackers entirely. Instead, they suggest a more measured approach:

• Treat the data as a rough trend, not a diagnosis. Night-to-night scores fluctuate and do not reflect clinical reality.
• Turn off morning notifications if the first thing you feel after checking your score is dread.
• Remove the device occasionally — especially if you find yourself lying awake worrying about the data it is recording.
• Seek cognitive behavioral therapy for insomnia (CBT-I), the gold-standard non-drug treatment, which can incorporate tracker data constructively rather than anxiously.

The irony of orthosomnia captures a broader tension in the quantified-self movement: more data does not always mean better health. For sleep — an activity that, by definition, requires letting go of conscious control — sometimes the smartest thing a device can do is stay on the nightstand.