Bed

What It Is

The way you use your bed, and when you get into it.

Why It Matters

Behavioral treatment for insomnia works, but not through the parts most people reach for. Two independent analyses of its components agreed that adding relaxation training to a program did not improve it and that sleep hygiene advice added nothing measurable. What carried the effect was cognitive and behavioral: restructuring unhelpful beliefs about sleep, mindfulness-based approaches, restricting time in bed, and controlling what the bed is used for. This entry covers the last two.

The proposed mechanism is reconditioning, though it may be simpler than that and amount to reducing the effort you put into sleeping. Either way, time spent awake in bed appears to teach you to treat the bed as a place for being awake, and lying there willing sleep to come raises arousal rather than lowering it. The instructions are unglamorous: hold one fixed wake time, get into bed only when you are sleepy, get up again if sleep is not coming, and do not extend time in bed to make up for a bad night. Pooled trials of restricting time in bed on its own report gains in sleep efficiency, and reductions in both the time taken to fall asleep and the time spent awake at night, and a nurse-delivered version beat a sleep hygiene booklet in primary care patients.

Be clear about what this does not do: it improves the quality of your time in bed, not the amount of sleep you get. Pooled trials found no gain in total sleep time and a newer analysis found a reduction, which is how the method is meant to work, and in one small laboratory study measured sleep fell sharply in the early weeks, alongside more daytime sleepiness and slower reactions, before both recovered within a few months. Use it to fix broken sleep rather than short sleep, and if you are simply not spending enough time in bed, add time before taking any away. Almost all of this evidence comes from people treated for insomnia rather than healthy adults, so expect a modest return, and be wary of props: music at bedtime improved how people rated their sleep, but the trials that measured sleep directly found no improvement.

• Kyle, S.D. et al. (2014). Sleep restriction therapy for insomnia is associated with reduced objective total sleep time, increased daytime somnolence, and objectively impaired vigilance: implications for the clinical management of insomnia disorder. Sleep. doi.org/10.5665/sleep.3386
• Edinger, J.D. et al. (2021). Behavioral and psychological treatments for chronic insomnia disorder in adults: an American Academy of Sleep Medicine clinical practice guideline. Journal of Clinical Sleep Medicine. doi.org/10.5664/jcsm.8986
• Maurer, L.F. et al. (2021). The clinical effects of sleep restriction therapy for insomnia: A meta-analysis of randomised controlled trials. Sleep Medicine Reviews. doi.org/10.1016/j.smrv.2021.101493
• Jespersen, K.V. et al. (2022). Listening to music for insomnia in adults. Cochrane Database of Systematic Reviews. doi.org/10.1002/14651858.CD010459.pub3
• Kyle, S.D. et al. (2023). Clinical and cost-effectiveness of nurse-delivered sleep restriction therapy for insomnia in primary care (HABIT): a pragmatic, superiority, open-label, randomised controlled trial. The Lancet. doi.org/10.1016/S0140-6736(23)00683-9
• Furukawa, Y. et al. (2024). Components and Delivery Formats of Cognitive Behavioral Therapy for Chronic Insomnia in Adults: A Systematic Review and Component Network Meta-Analysis. JAMA Psychiatry. doi.org/10.1001/jamapsychiatry.2023.5060
• Steinmetz, L. et al. (2024). Network meta-analysis examining efficacy of components of cognitive behavioural therapy for insomnia. Clinical Psychology Review. doi.org/10.1016/j.cpr.2024.102507
• Wei, J. et al. (2026). The Effect of Single-Component Sleep Restriction Therapy for Insomnia in Adults: A Meta-Analysis of Randomised Controlled Trials. Journal of Sleep Research. doi.org/10.1111/jsr.70200