Non-restorative sleep

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Non-restorative sleep (NRS), also known as unrefreshing sleep, is a subjective symptom in which sleep is experienced as insufficiently refreshing and hence subjective sleep quality as poor. This can be despite the appearance of otherwise normal sleep, like adequate sleep duration and lack of nighttime awakenings. NRS is associated with daytime cognitive dysfunction, affective symptoms, fatigue, sleepiness, and increased pain sensitivity. It is diagnosed exclusively via self-report or sleep questionnaires.

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