Sleep-restriction therapy is designed to limit the hours you might
spend thinking you should be asleep. People with
insomnia often stay in bed, trying to sleep more;
sleep-restriction therapy limits the amount of time in bed to the actual time
spent in sleep and sexual activity. If you have been lying in bed for 8 hours
but are only sleeping for 4 hours a night, then with this therapy your time in
bed is restricted to 4 hours.
Once you remove the extra time spent trying to sleep, the time in bed
is actually spent sleeping. A "sleep debt" accumulates, allowing you to fall
asleep sooner each night. As sleep amount increases, so does the amount of time
spent in bed.
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