Pair sleep restriction with stimulus control

Use the restricted window only for sleep — not reading, screens, or lying awake — to re-pair the bed with sleepiness.

Why it works

Chronic insomnia involves a conditioned arousal response to the bed: the brain has learned through repeated experience that bed = wakefulness, worry, and effort. Stimulus control breaks this by only allowing bed use when genuinely sleepy and by removing all bed-as-alert activities (screens, work, reading, watching TV). Sleep restriction provides the pressure; stimulus control ensures it is associated with the bed rather than the couch or kitchen.

How to do it

1. Go to bed only when genuinely drowsy — not just at the scheduled time if you are not sleepy.
2. If you are awake for more than twenty minutes in bed, get up and go to another room until sleepy.
3. Use the bedroom only for sleep (and sex) — remove all screens and work materials from the room.

Evidence

Stimulus control therapy is the most replicated single-component intervention for chronic insomnia; combined with sleep restriction in CBT-I, the effects are strong and durable. (rct)

The instruction to get out of bed when awake feels counterintuitive and requires persistence, especially in the first week when homeostatic pressure is being built and daytime sleepiness is high.

Sources

• Bootzin & Epstein (2011), understanding and treating insomnia, Annual Review of Clinical Psychology

Common mistake

Staying in bed when awake "to rest" — which the brain codes as more evidence that bed and wakefulness belong together, perpetuating the conditioned arousal the whole protocol is trying to extinguish.