Sleep compression is a CBT-I technique that narrows time in bed incrementally — typically 15 to 30 minutes per week — until it approximates the amount of sleep a person actually obtains. Classic sleep restriction makes that adjustment in a single step; compression arrives at the same place more gradually.
Why reducing time in bed improves sleep
Chronic insomnia is often maintained by spending long hours in bed awake. That weakens the association between bed and sleep, dilutes sleep pressure across a wide window, and increases time spent monitoring and trying. Consolidating the window raises sleep drive, shortens sleep onset, and reduces time awake at night. As sleep efficiency rises, the window is expanded back.
Who compression suits
- Older adults and people with medical fragility.
- People with daytime safety-critical roles where acute sleepiness is a risk.
- Conditions where abrupt sleep loss is inadvisable, including seizure disorders and bipolar disorder — these require clinician supervision.
- People who have previously abandoned sleep restriction because it felt too abrupt.
Doing it safely
Compression requires accurate sleep diary data, a floor below which the window is not reduced, monitoring of daytime sleepiness, and driving-safety planning. It is a clinical procedure and is best delivered with a trained provider rather than self-administered.
Written and reviewed by Christine Mason, PhD, DBSM, health psychologist board-certified in behavioral sleep medicine. Published August 25, 2026. Last reviewed August 25, 2026.
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