World Sleep Society Develops Standardized Sleep Tracking Measures
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SINGAPORE and ROCHESTER, Minn., Oct. 13, 2026 /CourierPR/ -- A team of sleep scientists, clinicians, and engineers from academia and industry has developed a specification to standardize the definitions and data standards for a core set of Fundamental Sleep Measures (FSMs) generated by consumer health trackers. This initiative, spearheaded by the World Sleep Society, aims to address the inconsistencies in sleep tracking metrics reported by different devices, thereby enhancing the utility of wearable sleep data in clinical care, research, and public health.
The new specification, published in the journal Sleep Medicine, defines a common semantic framework for key sleep measures such as sleep onset and offset, the main sleep period, sleep duration, wake after sleep onset, sleep regularity, 24-hour sleep including naps, and subjective sleep satisfaction. It also introduces explicit rules for handling missing or uncertain data, ensuring that the same name for a measure means the same thing across different devices.
Professor Michael Chee, Director at the Centre for Sleep and Cognition, NUS Yong Loo Lin School of Medicine, led the team that developed the specification.
Without common definitions, it is challenging for clinicians, researchers, and healthcare systems to ensure that they are comparing like with like. The new framework addresses this issue by establishing a common backend meaning for a minimum set of measures. This allows data produced by different devices to be interpreted consistently by electronic health records (EHRs), research databases, and population-health systems.
The specification does not prescribe which sensors should be used or how algorithms should be constructed. Instead, it focuses on the fundamental and interpretable aspects of sleep, ensuring that the measures are meaningful and actionable for consumers. For instance, it distinguishes between behavioural intention and physiology, requiring those concepts to be represented separately.
The World Sleep Society, which convened the multinational, multidisciplinary team, emphasized the importance of this collaboration.
The authors see standardization as a crucial step toward moving wearable sleep information from isolated proprietary ecosystems toward data that can be meaningfully used across healthcare and public-health systems. Long-term wearable data could eventually allow clinicians to consider not only how someone slept last night but whether they routinely obtain adequate sleep, maintain a stable schedule, or show sustained changes in sleep patterns alongside changes in health.
The World Sleep Society's mission is to convene the world of sleep medicine science, practice, and advocacy. This initiative demonstrates the value of the organization's efforts in bringing together diverse stakeholders across sleep science and medicine to turn emerging challenges into opportunities.