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Wake After Sleep Onset

Wake after sleep onset (WASO) measures time awake after initially falling asleep—bathroom trips, stress, or environment noise. Occasional WASO is normal; chronic high WASO erodes recovery even with adequate time in bed.

Wake after sleep onset (WASO) measures time awake after initially falling asleep—bathroom trips, stress, or environment noise. Occasional WASO is normal; chronic high WASO erodes recovery even with adequate time in bed.

Alcohol, late heavy meals, and irregular bedtimes commonly raise WASO.

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