Purpose Although polysomnography is necessary for diagnosis of most sleep disorders, it is
also expensive, time-consuming, intrusive, and interferes with sleep. Field-based activity …

Study Objectives: The aim of this study was to examine the feasibility of sleep estimation
using a device designed and marketed to measure core physical activity. Methods: Thirty …

Background This study aimed to develop an algorithm for determining sleep/wake states by
using chronological data on the amount of physical activity (activity intensity) measured with …

Actigraphy has become a common method of measuring sleep due to its non-invasive, cost-
effective nature. An actigraph (Readiband™) that utilizes automatic scoring algorithms has …

Polysomnography (PSG) is the “gold standard” for monitoring sleep. Alternatives to PSG are
of interest for clinical, research, and personal use. Wrist-worn actigraph devices have been …

Abstract Study Objectives Consumer sleep-tracking devices are widely used and becoming
more technologically advanced, creating strong interest from researchers and clinicians for …

Study Objectives: To compare the quality and consistency in sleep measurement of a
consumer wearable device and a research-grade actigraph with polysomnography (PSG) in …

We compared performance in deriving sleep variables by both Fitbit Charge 2™, which
couples body movement (accelerometry) and heart rate variability (HRV) in combination with …

Actigraphy is increasingly used for sleep monitoring. However, there is a lack of
standardized methodology for data processing and analysis, which often makes between …

Consumer activity trackers claiming to measure sleep/wake patterns are ubiquitous within
clinical and consumer settings. However, validation of these devices in sleep disorder …